Hello Jon_BTC,
It is possible to back up Azure Arc connected servers using Azure Backup. However, there are some prerequisites that need to be met before you can start backing up your servers. For that you can refer to Azure Backup Agent Support Matrix
First, you need to register your Azure Arc connected servers with Azure Backup. You can do this by installing the Azure Backup agent called MARS on your servers and then registering them with Azure Backup vault.
How to guides: https://learn.microsoft.com/en-us/azure/backup/install-mars-agent https://learn.microsoft.com/en-us/azure/backup/backup-windows-with-mars-agent
Once your servers are registered, you can create a backup policy in Azure Backup to define the backup schedule and retention policy. You can then associate the backup policy with the servers that you want to back up
For more information on how to back up Azure Arc connected servers using Azure Backup, please refer to the following documentation: https://learn.microsoft.com/en-us/azure/backup/backup-azure-about-mars
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