Recently, I faced a situation in which I had to activate Windows Server 2008 R2 Enterprise which didn’t have internet connection. In the earlier days of Windows 2003 there was a Phone Activation option within the wizard. However, in the current edition Windows 2008 onwards the option doesn’t exist.
I am going to show you the steps involved in quickly activated Windows Server 2008 onwards over the Phone using the following command line parameters:
- Start –> Run –> Command Prompt right click and “Run as a administrator”
- Type the following command to retrieve the Product Installation id slmgr.vbs /dti (A pop-up windows will appear with a long string of digits)
- Call the Microsoft activation centers as per your locations from this Microsoft Activation Centers link
- I used the India number 1800 11 11 00 or 1800 102 1100
- Provide the Installation ID to the customer care representative and they will provide a Confirmation Number (A long sting of numbers)
- Type slmgr.vbs /atp (without ) at the command prompt and you will receive a pop-up that your Windows have been activated successfully
- To confirm your activation type the following command slmgr.vbs /dli
Go to your Server Manager and you will be able to see the Windows Server 2008 R2 activated 
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Best Regards,
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