Tag Archives: VMware Horizon

Explorer.exe keeps crashing every 3 seconds in Windows 10

19 Oct

It was patch Tuesday time, and we were implementing the Windows 10 1909 Oct October 12, 2021—KB5006667 (OS Build 18363.1854) patch to our base images which are used for VMware Horizon VDI. During our validations, we started noticing the strange behaviour of Explorer.exe crashing and desktop becoming completely unusable.

Issue

The Windows explorer.exe keeps crashing within the virtual desktop of Windows 10 1909. The virtual desktop is entirely unusable. The only way to see the Event Viewer or anything is by using Horizon Client – Options – Send Ctrl + Alt + Del command within the virtual desktop and then opening up the Task Manager.

Cause

Provided by Microsoft – The explorer is trying to update feeds content, and there is a NULL value due to this bug that is causing explorer to crash.

Resolution

We tried performing various steps of un-install and re-installing the patch etc.. However, nothing worked, and we ended up working with Microsoft and seemed like it was a known issue, and they provided us with the following fix:

Option 1 – Registry – Disable News and Interest

Open regedit.exe on the golden image or

 Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Feeds\
 REG_DWORD name: ShellFeedsTaskbarViewMode
 Value: 2

Option 2 – GPO – Disable News and Interest

To access the policy for news and interests on the taskbar, on a device that has installed Administrative Templates (.admx) for Windows 10 October 2020 Update (20H2) – v2.0 ADMX file Feeds.admx is newly added, and we can retrieve it from the below .admx file:

Computer Configuration > Administrative Templates > Windows Components > News and interests > News and interests on the taskbar > Select Disabled

Note – I suspect this fix might be applicable to other Windows 10 versions.

I hope you will find these steps helpful to resolve explorer.exe crashing issue and don’t have to go down the path of troubleshooting the issue.

Thanks,
Aresh Sarkari



VMware EUC stack upgrade – Legacy? or Modernizing? or Middleground?

14 Sep

It was that time of the year to perform a VMware End-User Computing (EUC) stack upgrade on the environment, and I thought of sharing the overall thought process and decisions made along the way. It will be interesting to share with others who might be in a similar situation or process of developing their upgrade/migration strategies. In this post, we shall take a look into these topics:

  • Current versions of the VMware EUC Stack
  • What version numbers did we upgrade/migrated to?
  • Why did we migrate to these versions?
  • Wishlist (Someone Listening?)
  • Valuable links to reference during upgrade/migration

Current versions of the VMware EUC Stack

  • VMware Horizon 7.11 (Connection Server/Agents)
  • VMware Horizon Client 5.5
  • VMware App Volumes 2.18.1.x Manager/VMware App Volumes 2.18.5 Agent version
  • VMware Workspace ONE Access 20.01/Connector 1903 (Not in scope for the upgrade)
  • VMware Dynamic Environment Manager 9.10
  • VMware Unified Access Gateway 3.10

What versions numbers did we upgrade/migrated to?

  • VMware Horizon 7.13.1 (Connection Server/Agents)
  • VMware Horizon Client 5.5.2
  • VMware App Volumes 2.18.10.10 (Manager/Agents)
  • VMware Dynamic Environment Manager 2103
  • VMware Unified Access Gateway 2103.1

Why did we migrate to these versions?

The obvious question everyone might ask is the latest versions are Horizon 8.x and App Volumes 4.x why are you picking older versions for the upgrade? The short answer is the limitations and trade-off, and the following matrix tries to uncover in more detail.

Note – Not all customers might fall under the limitation category, or the limiting feature/functionality could be different in your case. By no means this should be your defacto reasons. Make sure to evaluate your situation and create a matrix to make a data-driven decision. If the project is greenfield/no-limitations applied, it’s a no-brainer to opt for the latest product releases.

ProductUpgrade DecisionVerison of Choice
VMware Horizon++ We had all the boxes ticked from a feature/functionality standpoint to be able to upgrade/migrate to Horizon 8.x version. (Instant Clones, Printing, UAG etc.). Infact everything worked well in the development environment
++ The latest vROPS Horizon Adapter 1.2/Horizon 8.x version doesn’t include the built-in Horizon reports. We use the reporting feature for all sorts of custom reporting on Horizon PODs. The older version of vROPS Horizon Adapter 6.7.1/Horizon 7.x has all the existing metrics and reporting available but doesn’t include support for Horizon 8.x on the support matrix
++ The no reporting on the Horizon Adapter 1.2 + limited metrics on RDSH limited our ability to move to the latest version of Horizon 8.x. Once the built-in reports\metrics and guidance is made available, we shall jump onto the latest version (n-1)
Horizon 7.13.1
VMware App Volumes++ Lack of Writable Volumes (UIA+Profile and UIA) migrations from 2.18.x to 4.x. Need official guidance or tool/script/guidance to upgrade all the wrtiable of the 2.18.x environment to 4.x. I am sure alot of enterprise customers will have plenty of Writable Volumes to migrate and don’t have the flexibility to start from scratch on a new version
++ VMware AppStack Migration fling is the perfect migration utility to migrate AppStacks 2.18.x to 4.x need something similar for Writable Volumes
App Volumes 2.18.10.10
VMware Dynamic Environment Manager++ This was the only piece of software that didn’t have interoperability or upgrade complexity. The obvious choice was to upgrade to the latest (n-1)DEM 2103
VMware Unified Access Gateway++ The appliance has no interoperability issues with Horizon 7.13.1 or upgrade complexity. The obvious choice was to upgrade to the latest (n-1)UAG 2103.1
Upgrade Decision Matrix

The above stack provides us with the required General Availability support until Q2 FY2022 and beyond.

Wishlist

I am looking forward to vROPS Horizon Adapter XX to include the built-in Horizon Reports/Additional Metrics for RDSH in the new version or provide detailed guidance on creating meaningful reports in future releases. Additionally, the App Volumes team releases tools and advice on migrating 4000’s+ Writable Volumes from 2.18.x to 4.x. Once the above is released, I plan to upgrade to the branch of Horizon 8.x and App Volumes 4.x releases version numbers.

Valuable links to reference during upgrades

Here is the cheat sheet for all the useful links to review and formulate an upgrade plan:

DescriptionLinks
VMware Product Interoperability MatrixProduct Interoperability Matrix (vmware.com)
Product DocumentationVMware Horizon Documentation
VMware App Volumes Documentation
VMware Dynamic Environment Manager (Formerly Known as VMware User Environment Manager) Documentation
Techzone Migrating Legacy Horizon Components to Modern Alternatives

View Composer –> Instant Clones
Security Server –> UAG
Persona –> DEM
Persistent Disk – FSLogix
Modernizing VDI for a New Horizon | VMware
App Volumes Upgrade considerationsVMware App Volumes 4 Installation and Upgrade Considerations | VMware
Fling Migrate App Volumes AppStack from 2.18.x to 4.xApp Volumes Migration Utility | VMware Flings
Supported Windows 10 versions based on Horizon AgentSupported versions of Windows 10 on Horizon Agent Including All VDI Clones (Full Clones, Instant Clones, and Linked Clones on Horizon 7) (2149393) (vmware.com)
VMware EUC Stack Agent OrderAgent installation order for Horizon View, Dynamic Environment Manager, and App Volumes (2118048) (vmware.com)
Supported Windows 10 versions based on App Volumes AgentVMware App Volumes and Microsoft Windows 10 Support
VMware Product Lifecycle – End of LifeProduct Lifecycle Matrix (vmware.com)
Reference Material

I hope you will find the above information useful in your enterprise upgrade/migrate strategy for VMware EUC Stack. I would love to hear your strategy and similar situations limiting your ability to migrate to the latest and greatest versions.

Thanks,
Aresh Sarkari

My top sessions for VMworld 2021

31 Aug

VMworld 2021 is right around the corner, and it’s time to have a personally curated list prepared for the sessions. The following category sessions I am most excited about. Note I am excited about more sessions than I can include in this blog post, but you get the idea of my direction 🙂 Though I am not speaking, I know the amount of effort to prepare the deck/recording based on my previous 3 VMworld speaking engagements. Good Luck, speakers!

  • End User Services
  • Multi Cloud
  • VMware Code

End User Services

Architecting Multi-Cloud Horizon [EUS1547]

Learn how to architect multi-cloud VMware Horizon deployments. This technical session will cover the deployment options and platforms available, including Horizon, Horizon Cloud Service on Microsoft Azure, Horizon on VMware Cloud on AWS, Horizon on Azure VMware Solution, and Horizon on Google Cloud VMware Engine. Find out how Horizon Control Plane Services, such as Universal Broker and Image Management Service, aid in both administration and user access.

Speakers:
Chris Halstead, Senior Staff Architect, VMware
Hilko Lantinga, Staff Architect, VMware
Richard Terlep, Staff Architect, EUC Technical Marketing, VMware
Darren Hirons, Lead Solutions Engineer – Digital Workspace, VMware

Back to Our Future: Community Roundtable on the VDI Admin Role Development [EUS2461]

A VDIscover Experience session. The life of a VDI admin requires expertise across many areas of IT and as a result, can be very rewarding. But how does what you’re doing today translate to a career path in desktop and app virtualization in the future? Join this roundtable of community VDI experts, hosted by VMware’s Brian Madden and Ron Oglesby, to gain insights on how the VDI admin role will develop in the future and what you should be focusing on to develop skills that can make you stand out in the VDI space, including security, cloud, SaaS, and more.

Speakers:
Joris Adriaanse, Business Development Manager, FONDO.
Ron Oglesby, Staff Architect, VMware
Brian Madden, Distinguished Technologist, VMware
Maarten Caus, EUC architect, ITQ

Blasting your way into the Extreme with VMware Horizon [EUS1834]

Ever wondered where the “Extreme” bit from Blast Extreme is referring to? In this session, seeing is believing. You will witness VMware Horizon hosting insanely intensive workloads, from cloud gaming and immersive VR training to movie making and warfighting simulation. We will show what it takes to extend VMware Horizon beyond your typical VDI use cases and into the realms of media production, gaming, simulation, training and more. You will also learn how customers are utilising VMware Horizon, Blast Extreme and more to deliver next generation services during a global pandemic. Oh, and did we mention that we will show you some demos which will blow you away? This is a must-see session for any EUC enthusiast!

Speakers:
Matt Coppinger, Director, Product Management, EUC, VMware
Spencer Pitts, Chief Technologist, VMware
Johan Van Amersfoort, Technologist EUC, ITQ

Create, Automate, and Optimize a Windows Image for Horizon [EUS1549]

This technical session led by VMware End-User Computing Technical Marketing will be a deeper dive into the key elements of creating and optimizing Windows for use as a VMware Horizon desktop or RDSH host. This process is critical to the success of any virtual desktop infrastructure (VDI) or published application project, and is often skipped or misunderstood. All steps of the process will be covered, including how to add automation. This session will include several demos showing the process of creating an optimized Windows VDI image.

Speakers:
Graeme Gordon, Senior Staff EUC Architect, VMware
Hilko Lantinga, Staff Architect, VMware

Disaster Recovery with Multi-Cloud Horizon [EUS1548]

Learn how to design VMware Horizon to provide disaster recovery (DR) capabilities to enable availability, recoverability, and business continuity. This session will explore the strategy, different deployment options for recovery sites, options for user access, and considerations for data replication and failover.

Speakers:
Richard Terlep, Staff Architect, EUC Technical Marketing, VMware
Graeme Gordon, Senior Staff EUC Architect, VMware

Horizon Cloud Service on Microsoft Azure: Nuts and Bolts [EUS2489]

So, is it the year of virtual desktop infrastructure (VDI)? A profound yes. The events of this year meant that business had to pivot rapidly to a remote model (telework). And one platform that helped many businesses, small to large, is VMware Horizon Cloud Service on Microsoft Azure. In this session, you will see what is needed to get an environment up and running very quickly.

Speakers:
Linus Bourque, Principal Instructor, VMware
John Krueger, Principal Instructor, VMware

Multi-Cloud VDI Beyond the Reference Architecture: Field-Tested Practices [EUS1961]

A VDIscover experience session. The public cloud, especially a VMware-based public cloud service, is an ideal place to run virtual desktops and published application workloads. But deploying an end-user computing solution into a hybrid or multi-cloud scenario adds new considerations and complications that impact user experience. In this session, VMware End-User Computing technologists Sean Massey and Dan Berkowitz will join with leading community members to discuss the key considerations and field-tested practices for delivering a good user experience in hybrid or multi-cloud VDI environments.

Speakers:
Daniel Berkowitz, Sr. Architect, VMware
Sean Massey, Staff Multi-Cloud Solutions Architect, VMware
Eduardo Molina, EUC Practice Director, AHEAD
Johan Van Amersfoort, Technologist EUC, ITQ
Simon Long, VMware Engineer, Google Cloud Center of Excellence, Google

Accelerate Your VDI Management with vRealize Operations [MCL1899]

This session provides an understanding of why VDI and app management matters more than ever today, and how to create a digital foundation that supports ever-changing business requirements. We will focus on the new VMware vRealize Operations Management Pack for Horizon and how it can help organizations overcome today’s distributed challenges.

Speaker:
Thomas Bryant, Sr. Product Line Marketing Manager, VMware

Multi-Cloud

App Modernization Deep Dive with VMware Cloud on AWS and VMware Tanzu [MCL2290]

Application modernization is top of mind for all enterprises that want to deliver value to their customers quickly. However, many organizations struggle to begin their application modernization journey due to a variety of reasons including legacy systems, lack of knowledge of the application, and application dependencies. In this session we will show how organizations can leverage VMware Tanzu and VMware Cloud on AWS to discover, analyze, and map dependencies, convert to containers and ultimately deploy a modernized application on an API driven infrastructure, while still realizing the TCO benefits that come with VMware Cloud on AWS.

Speaker:
William Lam, Senior Staff Solution Architect, VMware

Automate and Improve Day 2 Operations with vSphere Lifecycle Manager [MCL1274]

VMware vSphere Lifecycle Manager enhances the way administrators plan and execute VMware ESXi lifecycle operations. Reducing the amount of time required to update and upgrade your systems is imperative as the number of systems and environments grow. This talk details the features and capabilities of vSphere Lifecycle Manager, including newly added support for VMware NSX-T and VMware Tanzu. If you are looking to further automate vSphere Lifecycle Manager with VMware PowerCLI, we will provide the information and examples needed to get started. vSphere lifecycle management has never been easier.

Niels Hagoort, Staff Technical Marketing Architect, VMware
Jatin Purohit, Sr. Technical Marketing Manager, VMware

Azure VMware Solution Best Practices for Implementation and Migration [MCL3114S]

Join us for an interactive discussion on best practices when implementing, migrating and managing your Azure VMware Solution environment. Learn from our Azure VMware Solution experts and their experiences working closely with customers throughout deployment, including how to optimize for different scenarios and how to leverage the best of VMware and Azure services.

Jeramiah Dooley, Principal Cloud Advocate, Microsoft
Shannon Kuehn, Cloud Advocate, Microsoft

Azure VMware Solution: Deployment Deep Dive [MCL2036]

In this session, we will discuss planning and deployment of Azure VMware Solution beyond the quick start. We will cover planning for network addressing, connectivity, integrating into an existing Azure hub and spoke or virtual WAN deployment, configuring monitoring and management, and establishing governance controls.

Jeremiah Megie, Principal Cloud Solutions Architect, VMware
Steve Pantol, Sr. Technical Marketing Architect, VMware

Azure VMware Solution: Lessons Learned and Trends from Customer Deployments [MCL2004]

In this session, we will share lessons learned from Microsoft and VMware architects about best practices through many customer deployments and migrations to Azure VMware Solution. We will focus on deployment, security, network, migration, infrastructure components (e.g., LDAP/DNS), disaster recovery, and day 2 operations design decisions and recommendations. Specifically, we will demonstrate how architecture considerations translate from on premises to the cloud without sacrificing design principles or technology investments already in place. Migration is just one part of the customer’s modernization journey. We will also show how current applications can take advantage of native Azure services.

Emad Younis, Director, Multi-Cloud Center of Excellence, VMware
Trevor Davis, Senior Technical Specialist, Microsoft

VMware Code

Managing your Horizon Environment Using the Python Module for Horizon [CODE2747]

Learn how to get started with Python and the VMware Horizon REST API to automate desktop and RDS pool CRUD (create/read/update/delete) operations. Find out about the basic principles of the Python module for Horizon and what it takes to get started with your automation project in a session full of demo’s

Speaker:
Wouter Kursten, Professional Services Engineer, ControlUP

Pitfalls of Infrastructure as Code (And How to Avoid Them!) [CODE2758]

Are you looking to start your journey into Infrastructure as Code? Or have you already jumped in head-first? Either way, this session is for you! We’ll talk about many of the common pitfalls of IaC, and how you can avoid them. From infrastructure pitfalls, to coding pitfalls, we’ll go over all kinds of things that you may not have thought of yet. Get your questions ready, because I’m here to help you be successful in your IaC journey!

Speaker:
Tim Davis, DevOps Advocate, env0

Live Coding: Terraforming Your vSphere Environment [CODE2755]

Infrastructure as code is the process of managing infrastructure in a file or a set of files rather than manually configuring resources in a user interface. This session is going to take a live look at how to make the process of getting starting with infrastructure as code in a VMware vSphere environment as easy as possible using HashiCorp Terraform, the de facto standard for infrastructure as code.

Speaker:
Kyle Ruddy, Sr Technical Marketing Manager, HashiCorp

vSAN

A Field Guide to Health Check vSAN to Operate, Upgrade and Transform [MCL1825]

Your data is the most critical part of a solution. Ensuring predictability and technical security is a daily part of the system administrator’s role. Join this deep-dive session with Paul McSharry, a VCDX certified architect from the Critical Accounts Program, to discuss and be guided through what is needed for a production VMware vSAN platform health check. Based on field experience with some of VMware’s largest vSAN and VMware Cloud Foundation strategic customers, ask questions and take away a checklist to review before upgrades and significant changes to keep your data safe. Understand the architectural design choice impacts with 6.7 and 7.x, review the data path, and discuss useful KPIs that can be monitored to ensure you get the most value of your vSAN deployment.

Speaker:
Paul McSharry, Principal Architect, VMware

VMware vSAN – Dynamic Volumes for Traditional and Modern Applications [MCL1084]

In this session, Duncan and Cormac will explore the possibilities of using VMware vSAN for traditional virtual machine applications as well as new modern/containerized applications. They will look at how vSAN continues to evolve and at some of the more recent features. In particular, they will discuss vSAN File Service, which can now be used to deliver both NFS and SMB file shares, while continuing to offer block storage at the same time. They will also demonstrate how vSAN File Service integrates with the VMware vSphere container storage interface (CSI) in Kubernetes to dynamically provision read-write-many volumes for Pods that need shared storage. The session will incorporate some common how-tos, best practices, and gotchas to avoid to enable you with the smoothest experience possible with vSAN File Service.

Speakers:
Duncan Epping, Chief Technologist, VMware
Cormac Hogan, Chief Technologist, VMware

Disaggregating Storage and Compute with HCI Mesh: Why, When, and How [MCL1683]

There are multiple use cases for disaggregating Hyperconverged Infrastructure (HCI) storage. Common scenarios include environments with disproportionate requirements for compute and storage resources and architectures with limited local storage capacity, e.g., blade servers. HCI Mesh with vSAN provides a simple method for scaling compute and storage resources independently. You will learn why HCI storage disaggregation is beneficial, how HCI Mesh works, and what use cases to consider. There will be demos and we will also show examples of business-critical application design, tiering and scaling storage, and recommendations for successful implementation.

Speakers:
John Nicholson, Staff Technical Marketing Architect, VMware
Peter Flecha, Sr Technical Marketing Architect, VMware

I hope you will find these sessions list helpful in your journey, and please do let me know if I have missed out on exciting sessions.

Thanks,
Aresh Sarkari

Script to replace VMware Unified Access Gateway certificates (ADMIN and Internet)

9 Jul

Our certificates are coming close to expiry, and we use VMware Unified Access Gateway for Internal and External traffic tunneling. This brings us to perform the replacement of the expiring certificates on 12 UAG Appliances. Performing this activity from the GUI is straight forward. However, we need to perform this activity on 12 appliances.

Thanks to Mark Benson for the motivation, and I went ahead and created a script to perform this activity at further ease, sit back, relax and have a coffee!

Pre-requisites:

  • You need the CAchain pem and RSA private key certificate output in one line. Please make sure you run the following command to grab the output in a single line
    • Linux/Unix command – awk ‘NF {sub(/\r/, “”); printf “%s\n”,$0;}’ cert-name.pem
    • Linux/Unix command – awk ‘NF {sub(/\r/, “”); printf “%s\n”,$0;}’ cert-namersapriv.pem
    • I saved the certificate files on a Linux machine and then ran the above command. Pasted the output in Notepad++, which is in one line.
    • Doco reference
    • The CAChain pem certificate should include (MainCA content, Subordinate Certificate content and Root Certificate content without any spaces between them.)
  • There are seperate API calls for the certificate replacement for the ADMIN and Internet facing. You can comment or un-comment the block as per your requirement
    • /rest/v1/config/certs/ssl/ADMIN
    • /rest/v1/config/certs/ssl/END_USER
  • The IP address or Hostname of the UAG Appliance along with the admin password.
##############################################################################################################################################
# Replace the ADMIN and Internet Facing certificate on the UAG Appliance
# Uncomment if you dont plan to do both the interfaces (Internet/ADMIN)
# Get the certificate in one line following this documentation 
# https://docs.vmware.com/en/Unified-Access-Gateway/3.10/com.vmware.uag-310-deploy-config.doc/GUID-870AF51F-AB37-4D6C-B9F5-4BFEB18F11E9.html
# Author - Aresh Sarkari (Twitter - @askaresh)
##############################################################################################################################################

#UAGServer Name or IP
$UAGServer = "10.1.1.1"

#Ignore cert errors
add-type @"
    using System.Net;
    using System.Security.Cryptography.X509Certificates;
    public class TrustAllCertsPolicy : ICertificatePolicy {
        public bool CheckValidationResult(
            ServicePoint srvPoint, X509Certificate certificate,
            WebRequest request, int certificateProblem) {
            return true;
        }
    }
"@
[System.Net.ServicePointManager]::CertificatePolicy = New-Object TrustAllCertsPolicy
[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]'Ssl3,Tls,Tls11,Tls12'


#API Call to make the intial connection to the UAG Appliance##
$Uri = "https://$UAGServer`:9443/rest/v1/config/adminusers/logAdminUserAction/LOGIN"

$Username = "admin"
$Password = "enteryouradminpassword"

$Headers = @{ Authorization = "Basic {0}" -f [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(("{0}:{1}" -f $Username,$Password))) }

Invoke-WebRequest -SessionVariable DaLogin -Uri $Uri -Headers $Headers

#The PEM Certificate + Private Key in RSA Format
#The certificate has to be in online using linux command - awk 'NF {sub(/\r/, ""); printf "%s\\n",$0;}' cert-name.pem 
$certificatersaContent = "-----BEGIN RSA PRIVATE KEY-----\nMIIEo... followed by a large block of text...\n-----END RSA PRIVATE KEY-----\n"
$certificateContent = "-----BEGIN CERTIFICATE-----\nMIIEo... followed by a large block of text...\n-----END CERTIFICATE-----\n"

#Body to replace the certificate
$body = @{
  privateKeyPem = $certificatersaContent
  certChainPem = $certificateContent
} 

#Converting the Json and line breaks in strings 
#https://communary.net/2018/03/30/quick-tip-convertto-json-and-line-breaks-in-strings/
$Jsonbody = ($body | ConvertTo-Json).Replace('\\n','\n')

#API to replace the Admin Certificate of the UAG Appliance
#Please note that the Backtick ` is required in order to escape the colon
$outputadmin = Invoke-WebRequest -WebSession $DaLogin -Method Put -Uri "https://$UAGServer`:9443/rest/v1/config/certs/ssl/ADMIN" -Body $Jsonbody -ContentType "application/json" -Verbose

#API to replace the Internet facing Certificate of the UAG Appliance
#Please note that the Backtick ` is required in order to escape the colon
$outputenduser = Invoke-WebRequest -WebSession $DaLogin -Method Put -Uri "https://$UAGServer`:9443/rest/v1/config/certs/ssl/END_USER" -Body $Jsonbody -ContentType "application/json" -Verbose

GitHub scripts/vmwareuagcertreplace at master · askaresh/scripts (github.com)

Observations:

  • The array within the $body has further line breaks, which needs to adjust. I had to spend a considerable amount of time. Thanks to this blog post which came in hand. Powershell function ConvertTo-Json
  • The Powershell function Invoke-Webrequest and the -URI I had to add the Backtick ` in order to escape the colon
  • The key of the above script is the CAChain certificate and RSA Private Key certificate to be available online.

I hope you will find this script useful to replace or change the certificate on the VMware Unified Access Gateway appliances. A small request if you further enhance the script or make it more creative, I hope you can share it back with me?

Thanks,
Aresh Sarkari

Script to install VMware EUC Agents – App Volumes Agent, DEM Agent and Horizon Agent

30 Jun

If you are planning for the VMware EUC Stack migration or upgrade and want to install the VMware EUC agent, then continue reading. The guidance on uninstalling the existing agents can be found on this blog post – Script uninstall VMware EUC Agents – App Volumes Agent, Horizon Client, DEM Agent, Horizon Agent and VMware Tools | AskAresh

In this script, we shall perform the agents install and reboot the golden image towards the end. There is no need to install the individual agents one by one, instead, sit back, relax and have a coffee!

VMware EUC Agents:

  • VMware Horizon Agent (Works on 7.x and 8.x/YYMM)
    • Note few MSI switches are deprecated if you still use them, you will have an error code 1603
  • VMware Dynamic Environment Manager Agent (Works on 9.x and YYMM)
  • VMware App Volumes Agent (Works on 2.x and 4.x/YYMM)

Note – All the above testing is carried out on Windows 10 1909 with PowerShell 5.1. Reboot is required to complete the installation operations.

VMware EUC Agents Install

Pre-requisites:

#################################################################################################
# Install EUC Agents in the proper order - Horizon Agent , DEM Agent and App Volumes Agent
# Reboot the OS towards the end after install all Agents. Look for Exit Code 0 or 3010
# If you notice exit code 1603 there is a installation issue. Refer to my MSI switches blogpost
# Comment or Un-comment the Agent that does not apply to your environment
# Author - Aresh Sarkari (Twitter - @askaresh)
################################################################################################

###################################################################
#                    Declare Variables                            #
###################################################################

#Agent Names
$HorizonAgentName = "VMware-Horizon-Agent-x86_64*"
$DEMAgentName = "VMware Dynamic Environment Manager*"
$AppVolumesAgentName = "App Volumes Agent*"
$AppVolMGR = "avm001.domain.com" # Manager LB VIP

# All the installer Location
#Create a folder C:\Temp\Agents and place all the MSI\EXE in there
$TempInstallPath = "C:\Temp\Agents" 

#Log Files location
# Go through all the logs post installation
$HZlogFile = "C:\Temp\Agents\HZAgent.log"
$DEMlogFile = "C:\Temp\Agents\DEMAgent.log"
$ApplogFile = "C:\Temp\Agents\AppVolAgent.log"

###################################################################
#                    MSI Arguments Arrary for EUC Agents          #
###################################################################
# Modify any MSI switched related to the agent here.
# Follow this blog post for swithces - https://askaresh.com/2021/06/28/comparision-vmware-horizon-agent-7-x-8-x-silent-install-switches-and-properties/

# VMware Horizon Agent MSI Switches
$HZMSIArguments = @(
	"/qn"
	"VDM_VC_MANAGED_AGENT=1"
    "SUPPRESS_RUNONCE_CHECK=1"
	"VDM_IP_Protocol_Usage=IPv4"
	"ADDLOCAL=Core,ClientDriveRedirection,NGVC,USB,RTAV,PerfTracker,PrintRedir,HelpDesk,TSMMR,VmwVaudio,V4V"
	"REBOOT=REallySuppress"
	"/L*v"
	$HZlogFile
)

# VMware Dynamic Enivornment Agent MSI Switches
$DEMMSIArguments = @(
    "/qn"
    "ADDLOCAL=FlexEngine"
    "REBOOT=REallysuppress"
    "/L*v"
    $DEMlogFile
)

# VMware App Volumes Agent MSI Switches
$AppVolMSIArguments = @(
    "/qn"
    "MANAGER_ADDR=$AppVolMGR"
    "MANAGER_PORT=443"
    "REBOOT=REallysuppress"
    "EnforceSSLCertificateValidation=0"
    "/L*v"
    $ApplogFile
)

###################################################################
#                    Main                                        #
###################################################################

# Install VMware Horizon Agent
Write-Host "Installing the VMware Horizon Agent" -ForegroundColor Green
$HZAgentPath = (Get-ChildItem -Path $TempInstallPath | Where-Object {$_.name -like $HorizonAgentName}).Fullname

# The switches "/s /v " is the Install Shield switches and rest of the aruguments are passed with MSI
$HZAgentInstall = (Start-Process -Filepath $HZAgentPath -Wait -ArgumentList "/s /v ""$HZMSIArguments" -PassThru)
$HZAgentInstall.ExitCode

Start-Sleep 20

# Install DEM Agent
Write-Host "Installing the VMware DEM Agent" -ForegroundColor Green
$DEMPath = (Get-ChildItem -Path $TempInstallPath | Where-Object {$_.name -like $DEMAgentName}).Fullname
$DEMAgentInstall = (Start-Process -Filepath $DEMPath -ArgumentList $DEMMSIArguments -Wait -PassThru)
$DEMAgentInstall.ExitCode

Start-Sleep 20

# Install App Volumes Agent
Write-Host "Installing the VMware App Volumes Agent" -ForegroundColor Green
$AppVolPath = (Get-ChildItem -Path $TempInstallPath | Where-Object {$_.name -like $AppVolumesAgentName}).Fullname
$AppVolAgentInstall = (Start-Process -Filepath $AppVolPath -ArgumentList $AppVolMSIArguments -Wait -PassThru)
$AppVolAgentInstall.ExitCode

Start-Sleep 20

# Restart the computer
Write-Host "Restarting the computer post the VMware EUC Agents install" -ForegroundColor Green
Restart-Computer -Force

Git Hubscripts/vmwareeucagent-install at master · askaresh/scripts (github.com)

A big thanks to Chris H for providing the original blueprint of the script and Wouter for showing me the magical “space” on the switch /v within the Horizon Agent installer. Final thanks to Jishan for the numerous testing cycles and additions to a different version of this script which tackles VMware Tools reboot and continues installing post a reboot.

I hope you will find this script useful to install the VMware EUC agents and never look back to install them individually. A small request if you further enhance the script or make it more creative, I hope you can share it back with me?

Thanks,
Aresh Sarkari

Reference Article – VMware Agent Install order – Agent installation order for Horizon View, Dynamic Environment Manager, and App Volumes (vmware.com)

Script uninstall VMware EUC Agents – App Volumes Agent, Horizon Client, DEM Agent, Horizon Agent and VMware Tools

29 Jun

If you are planning for the VMware EUC Stack migration or upgrade and are in the middle of uninstalling the existing agents, look no further and here is the script that will allow you to uninstall all the agents and reboot the golden image towards the end. There is no need to remove individual agents one by one from the “Program and Features”; instead, sit back, relax and have a coffee!

VMware EUC Agents:

  • VMware App Volumes Agent (Works on 2.x and 4.x/YYMM)
  • VMware Horizon Client (Optional)
  • VMware Dynamic Environment Manager Agent (Works on 9.x and YYMM)
  • VMware Horizon Agent (Works on 7.x and 8.x/YYMM)
  • VMware Tools (Works on 11.x)

Note – All the above testing is carried out on Windows 10 1909/Windows Server 2016 with PowerShell 5.1. The PowerShell module Uninstall-Package suppresses individual reboot and we perform the final reboot towards the end using the Restart-Computer module. (Reboot is required to complete the uninstallation operations.)

VMware EUC Agents
#################################################################################
# Un-Install EUC Agents in the proper order for Golden Image
# App Volumes Agent, Horizon Client(Optional), DEM, Horizon and VMware Tools
# Suppressed auto Reboot the OS towards the end after un-installing all Agents.
# Comment or Un-comment the Agent that does not apply to your environment
# Author - Aresh Sarkari (Twitter - @askaresh)
#################################################################################

#Un-installing VMware App Volumes Agent
Write-Host "Un-installing the App Volumes Agent" -ForegroundColor Green
Get-Package -Name 'App Volumes **' | Uninstall-Package

sleep -Seconds 60

#Un-installing VMware Horizon Client
#Write-Host "Un-installing the VMware Horizon Client" -ForegroundColor Green
#Get-Package -Name 'VMware Horizon Cli**' | Uninstall-Package

#sleep -Seconds 60

#Un-installing VMware Dynamic Environment Agent
Write-Host "Un-installing the Dynamic Environment Agent" -ForegroundColor Green
Get-Package -Name 'VMware Dynamic **' | Uninstall-Package

sleep -Seconds 60

#Un-installing VMware Horizon Agent
Write-Host "Un-installing the VMware Horizon Agent" -ForegroundColor Green
Get-Package -Name 'VMware Horizon Ag**' | Uninstall-Package

sleep -Seconds 60

#Un-installing VMware Tools Agent
Write-Host "Un-installing the VMware Tools Agent" -ForegroundColor Green
Get-Package -Name 'VMware Tools' | Uninstall-Package

sleep -Seconds 60

# Restart the computer
Write-Host "Restarting the computer post the VMware EUC Agents Un-install" -ForegroundColor Green
Restart-Computer -Force

GitHub scripts/vmwareeucagent-uninstall at master · askaresh/scripts (github.com)

Thanks to Hilko and Joel for reviewing the script and providing valuable feedback.

I hope you will find this script useful to uninstall the VMware EUC agents and never look back to remove individual programs under “Programs and Features”. A small request if you further enhance the script or make it more creative, I hope you can share it back with me?

Thanks,
Aresh Sarkari

Comparison VMware Horizon Agent 7.x/8.x (Silent Install) Switches and Properties

28 Jun

We are in the middle of automating the VMware Horizon Agent 8.x installer for the golden images. To undertake such a task, it’s essential to understand all the MSI Switches that come along with the installer. If you had already automated the Horizon Agent 7.x install it’s also important to check which MSI switches have been removed in Horizon Agent 8.x/YYMM. The below details will show you the switches and highlight the removed/deltas MSI Switches and Properties.

I use a tool called lessmsi GitHub – activescott/lessmsi: A tool to view and extract the contents of an Windows Installer (.msi) file. which essentially extracts the MSI contents and provides a detailed table view of the feature components and properties.

Horizon Agent 8.x\YYMM version (Features available within the agent)

Feature (s38)Feature_Parent (S38)Title (L64)Description (L255)Directory_ (S72)
URLRedirectionCoreURL Content RedirectionRedirects URL content from a server session to a client device and vice versa. 
PSGCore   
VmVideoCore   
VmwVdisplayCore   
VmwViddCore   
SmartCardSingleUserTSCore   
RDSH3D 3D RDSHThis feature enables hardware 3D acceleration in RDSH sessions. 
NGVC VMware Horizon Instant Clone AgentHorizon Instant Clone Agent should only be installed on a virtual machine running on VMware vSphere 6.0/2015 U1 or later. 
ScannerRedirection Scanner RedirectionEnables the Scanner Redirection feature. 
SerialPortRedirection Serial Port RedirectionEnables the Serial Port Redirection feature. 
SmartCard Smartcard RedirectionEnables the Smartcard Redirection feature. 
TSMMR TSMMRTerminal Services Multimedia Redirection. 
PrintRedir VMware Integrated PrintingVMware Integrated Printing Redirection. 
USB USB RedirectionUSB Redirection. Refer to the VMware Horizon Security document for guidance on using USB redirection securely. 
V4V Horizon Monitoring Service AgentHorizon Monitoring Service Agent. 
VmwVaudio VMware AudioVMware virtual Audio driver 
SdoSensor SDO Sensor RedirectionEnables Simple Device Orientation(SDO) Sensor Redirection feature, reports device orientation changes to remote desktop. 
HybridLogon Hybrid LogonEnables Hybrid logon which allows an unauthenticated user access to network resources without the need to enter credentials. 
HelpDesk Help Desk Plugin for Horizon AgentHelp Desk Plugin for Horizon Agent. 
RDP Enable RDP (hidden)  
BlastUDPCore   
Core Core[ProductName] core functionalityINSTALLDIR
VMWMediaProviderProxy VMware Virtualization Pack for Skype for BusinessThis feature will enable optimization for Skype for Business in remote desktop 
ClientDriveRedirection Client Drive RedirectionAllow Horizon Clients to share local drives with remote desktops and applications. If not installed, copy/paste and drag and drop files and folders features will be disabled. 
RTAV Real-Time Audio-VideoReal-Time Audio-Video enables users to redirect locally connected audio and video peripherals back to the remote desktop for use. 
GEOREDIR Geolocation RedirectionEnables redirection of client’s geolocation to the remote desktop 
PerfTracker Horizon Performance TrackerEnables Horizon Performance Tracker 
Horizon Agent 8.x/YYMM Release MSI Features

Horizon Agent 7.x version (Features available within the agent)

Feature (s38)Feature_Parent (S38)Title (L64)Description (L255)Directory_ (S72)
URLRedirectionCoreURL Content RedirectionRedirects URL content from a server session to a client device and vice versa. 
PSGCore  
VmVideoCore  
VmwVdisplayCore  
VmwViddCore  
SmartCardSingleUserTSCore  
FlashURLRedirection Flash URL RedirectionEnables Flash URL Redirection for internal company controlled web pages. 
RDSH3D 3D RDSHThis feature enables hardware 3D acceleration in RDSH sessions. 
SVIAgent VMware Horizon View Composer AgentVMware Horizon View Composer Agent RDSH installs: This machine can be used as the parent image for provisioning Automated Farms 
NGVC VMware Horizon Instant Clone AgentHorizon Instant Clone Agent should only be installed on a virtual machine running on VMware vSphere 6.0/2015 U1 or later. It cannot be co-installed with Horizon View Composer Agent. 
ScannerRedirection Scanner RedirectionEnables the Scanner Redirection feature. 
SerialPortRedirection Serial Port RedirectionEnables the Serial Port Redirection feature. 
SmartCard Smartcard RedirectionEnables the Smartcard Redirection feature. 
TSMMR TSMMRTerminal Services Multimedia Redirection. Does not support IPv6 configuration. 
ThinPrint Virtual PrintingVirtual Printer Support 
PrintRedir VMware Integrated PrintingVMware Integrated Printing Redirection. 
USB USB RedirectionUSB Redirection. Refer to the VMware Horizon 7 Security document for guidance on using USB redirection securely. 
V4V vRealize Operations Desktop AgentvRealize Operations Desktop Agent. Does not support IPv6 configuration. 
VPA VMware Horizon 7 Persona ManagementVMware Horizon 7 Persona Management 
VmwVaudio VMware AudioVMware virtual Audio driver 
DeviceBridgeBAS Device Bridge BAS PluginEnables finger scanners supported by BAS system 
SdoSensor SDO Sensor RedirectionEnables Simple Device Orientation(SDO) Sensor Redirection feature, reports device orientation changes to remote desktop. 
CIT VMware Client IP TransparencyThis feature allows remote connections to Internet Explorer to use the Client’s IP address instead of this machine’s. Does not support IPv6 configuration. 
HybridLogon Hybrid LogonEnables Hybrid logon which allows an unauthenticated user access to network resources without the need to enter credentials. 
HelpDesk Help Desk Plugin for Horizon AgentHelp Desk Plugin for Horizon Agent. 
RDP Enable RDP (hidden)  
BlastUDPCore  
Core Core[ProductName] core functionalityINSTALLDIR
VMWMediaProviderProxy VMware Virtualization Pack for Skype for BusinessThis feature will enable optimization for Skype for Business in remote desktop 
ClientDriveRedirection Client Drive RedirectionAllow Horizon View Clients to share local drives with their remote desktops and applications. Does not support IPv6 configuration. 
RTAV Real-Time Audio-VideoReal-Time Audio-Video enables users to redirect locally connected audio and video peripherals back to the remote desktop for use. 
FLASHMMR Flash RedirectionFlash Redirection 
GEOREDIR Geolocation RedirectionEnables redirection of client’s geolocation to the remote desktop 
PerfTracker Horizon Performance TrackerEnables Horizon Performance Tracker 
Horizon Agent 7.x Release MSI Features

If you want to download the spreadsheet version of the table above/below you can find it below. Note there is a bonus within the spreadsheet: MSI Property comparision between Horizon Agent 7.x and Horizon Agent 8.x and two MSI Properties have been removed VDM_FLASH_URL_REDIRECTION and INSTALL_VDIDISPLAY_DRIVER (Part of the Core in 8.x).

Deprecated/Delta Features between 7.x and 8.x/YYMM release

From the table above, we know all the switches of the Horizon Agent 7.x and 8.x versions. Once we compare the above two tables, we are left with the following delta, and I have commented on whether each feature exists or is removed. Please make sure to remove them from your existing scripts or silent installers if you had added them during your Horizon 7.x installs.

Feature (s38)Title (L64)Description (L255)Additional Comments
FlashURLRedirectionFlash URL RedirectionEnables Flash URL Redirection for internal company controlled web pages.Flash come to EOL in 2020. Feature has been deprecated
SVIAgentVMware Horizon View Composer AgentVMware Horizon View Composer Agent RDSH installs: This machine can be used as the parent image for provisioning Automated FarmsVMware Compose was replaced by Instant Clones
ThinPrintVirtual PrintingVirtual Printer SupportThinPrint is replaced by VMware Integrated Printing
VPAVMware Horizon 7 Persona ManagementVMware Horizon 7 Persona ManagementPersona is replaced by App Volumes or DEM or FSLogic
DeviceBridgeBASDevice Bridge BAS PluginEnables finger scanners supported by BAS systemFeature has been deprecated
CITVMware Client IP TransparencyThis feature allows remote connections to Internet Explorer to use the Client’s IP address instead of this machine’s. Does not support IPv6 configuration.Feature has been deprecated
FLASHMMRFlash RedirectionFlash RedirectionFlash come to EOL in 2020. Feature has been deprecated
Delta or Deprecated feature list after comparing the above two tables

I hope you will find this post useful to perform silent installs on Horizon Agent. My request is if you find any additional delta or enhancements, please make sure to share it back with me.

Thanks,
Aresh Sarkari

Reference – Check out the VMware documentation on Silent Installation Properties for Horizon Agent (vmware.com)

VMware Horizon Events Database – Annual Clean-up (purge old data)

14 May

VMware Horizon doesn’t restrict the growth of the historical tables in the Horizon Events database. VMware has a detailed knowledge base article with describes in details Purging old data from the View Events Database (2150309). However, there is a catch if you are trying to delete many records at one time, you will get transaction log full error. The below procedure will help you overcome the challenge. In our scenario, we purge the records once every year.

use HZNLOG
select count(*) from [dbo].[POD1_event_data_historical] where EventID in (select EventID from [dbo].[POD1_event_historical] where Time < '2021-01-31 00:00:00.000')
select count(*) from [dbo].[POD1_event_historical] where Time < '2021-01-31 00:00:00.000'

In the above example HZNLOG is the name of the database. POD1 is the prefix of the Horizon Events Database (Check in Horizon Admin console) and 2021-01-31 is the YYYY-MM-DD format (Show me all records before 31st Jan 2021)

No. of older records in Events DB

If we used the delete tables mentioned within the knowledge base article, we get the following error “The transaction log for database ‘HZNLOG’ is full due to ‘LOG_BACKUP”. Of course, the number of records in our case we are trying to delete is relatively high(Millions).

Error during deletion “Log is full”

You can shorten the above query for approx. 30 or 15 days, but still in our scenario, one would have to run the delete query more than 15 times to perform the annual clean-up. After searching around, I came across a blog post – Deleting millions of records from a table without blowing the transaction log (A big thank you Merill for sharing his knowledge) I tweaked it for my usecase of Horizon Events DB clean-up and, in a single query within 20 mins I could perform a yearly clean-up without any fuss of transaction log getting full. Essentially this performs the clean-up in a batch size of 10,000 row counts.

DECLARE @continue INT
DECLARE @rowcount INT
 
SET @continue = 1
WHILE @continue = 1
BEGIN
    PRINT GETDATE()
    SET ROWCOUNT 10000
    BEGIN TRANSACTION
	delete from [dbo].[POD1_event_data_historical] where EventID in (select EventID from [dbo].[POD1_event_historical] where Time < '2021-01-31 00:00:00.000')
	delete from [dbo].[POD1_event_historical] where Time < '2021-01-31 00:00:00.000'
    SET @rowcount = @@rowcount 
    COMMIT
    PRINT GETDATE()
    IF @rowcount = 0
    BEGIN
        SET @continue = 0
    END
END

The ouput will look something like below:

Enteire deletion in batches of 10K rows

After running the above deletion query, now re-run the select query to see if records exist before 31st Jan 2021, and now we have 0 records.

Zero records found

I hope you will find this SQL query helpful to perform Horizon Events Database clean-up in a jiffy. My request if you further enhance the query or make it more creative, I hope you can share it back with me?

Thanks,
Aresh Sarkari

Unable to uninstall/upgrade VMware Horizon Client within the VMware App Volumes AppStack

22 Jul

We had a very long ongoing issue wherein we couldn’t uninstall or upgrade the VMware Horizon Client within the AppStack. We had successfully installed the Horizon Client within the AppStack. However, when it was time to perform an upgrade or uninstall to the latest version, it would fail during a reboot with the following error.

Unknown HardError

We initially saw the issue on App Volumes 2.14. While we were troubleshooting for an extended period, we upgrade to App Volumes 2.18.1, and both the versions exhibited the same failure during uninstall or upgrade.

Process to reproduce the error

  • Upgrade horizon client –> reboot –> hard error
  • Uninstall horizon client –> reboot –>hard error
  • Uninstall horizon client –> install horizon client –> reboot –> hard error
  • Upgrade horizon client –> complete provisioning without reboot –> completes successful –> during next update of AppStack it crashes with Hard error
  • Uninstall horizon client –> complete provisioning without reboot –> completes successful –> during next update of AppStack it crashes with Hard error

Environment Details

VMware Horizon 7.11
VMware App Volumes 2.18.1
VMware Dynamic Environment Manager 9.10
VMware Horizon Client 5.x

Process of elimination

  • Upgrade the Horizon Client to the various 5.x version to remove any version specific Client related issues
  • We didn’t have Antivirus running on the AppStack capturing template
  • We could build the AppStack from scratch with the newer version of Horizon Client but only upgrade/uninstall would fail
  • We were honestly running out of troubleshooting ideas

Resolution

After trying out all the usual steps and avoid re-creating AppStack every single time during life cycle management, we managed to open a VMware GSS case handled by Karan Ahuja(Very helpful support engineer), which ended been worked by the engineering team(Art Rothstein – Champ in AV Eng Team). Note quite alot of logs and Procmon were exchanged from the problematic application capturing VM template. Finally, the fix was determined as a AppStack snapvol.cfg exclusion. After putting this exclusion into the AppStack – App capturing VM during provisioning we could upgrade or uninstall Horizon Client.

exclude_registry=\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileService
Path exclusion in AppStack snapvol.cfg

Disclaimer – Due to the nature of the issue and time taken to resolve it we decided to move the Horizon Client from AppStack into the base image. However, the fix is validated, and 100% working post the exclusion.

I hope you will find this information useful if you encounter the issue. A big thanks to Manivannan Arul my teammate for his continuous effort while troubleshooting with GSS over a period of 4+ months.

Thanks,
Aresh Sarkari

Black screen when re-connect to VMware Horizon virtual desktop

27 May

We had an issue after we upgraded our EUC Stack, especially VMware App Volumes 2.14 to 2.18.1. Quite a few end-users started reporting black screen when they were trying to re-connect to their desktops post the original session launch. This would mean re-connect post breaks, endpoint screen locks, next working day re-connections, etc.

EUC Environment Details:
VMware Horizon 7.11
VMware App Volumes 2.18.1
VMware Dynamic Environment Manager 9.10
VMware Horizon Client 5.x
VMware Workspace One 3.3

Process of elimination

  • If we re-created the writable volumes of the problematic end-users the black screen issue would go away. This provided us with a clue that the problem lied with VMware App Volumes – Writable Volumes
  • No errors/failures observed within the VMware DEM/Horizon logs
  • Upgrade the Horizon Client to the latest 5.x version to remove any Client related issues
  • We already had the necessary anti-virus exclusion based on VMware Antivirus Considerations in a VMware Horizon 7 Environment

Resolution
After trying out all the usual steps and avoid re-creating writable volumes for problematic end-users, we managed to open a VMware GSS case handled by Karan Ahuja(Very helpful support engineer), which ended been worked by the engineering team(Art Rothstein – Champ in AV Eng Team). Note quite alot of logs, memory dumps, and Procmon were exchanged from the problematic VM using various remote gathering techniques. Finally, the fix was determined as a writable volume snapvol.cfg exclusion. (In our case, the problem is caused by smss.exe using a copy of winlogon.exe that is on the writable volume). After putting this exclusion into all problematic end-users, they stopped seeing Black screen issues upon re-connect.

exclude_path=%SystemRoot%\System32\winlogon.exe
Path exclusion in writable volumes snapvol.cfg

In this blog, I am not outlining the steps on how to add the snapvol.cfg exclusion as my ex-colleague Daniel Bakshi outlines on a VMware blog post on how to do it step by step. I hope you will find this information useful if you encounter intermittent black screen issues.

Thanks,
Aresh Sarkari