Azure Backup now supports Windows Server 2008 Virtual Machine backup
Updated: 13 February, 2020
You can now migrate your on-premises Windows Server 2008 to Azure, where you can continue to run and back them up on Azure virtual machines using Azure Backup. In Azure you'll stay compliant, become more secure, and add cloud innovation to your work.
For complete guidance on how to migrate, refer here.
For step by step guidance on how to backup virtual machine using Azure Backup, refer here.