@Nagendra Shah Got below information as well:
2008 is not supported fully within Azure, it has to have special updates and have special things done before it can be brought over - Upload a Windows Server 2008/2008 R2 specialized image to Azure | Microsoft Learn
Also for the mentioned issue Support is the best option for you. If you have a plan already requesting you to open one otherwise do let me know I will try to enable one time Free Support.
Hope it helps!!!
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