First, the VBR server itself can no longer be backed up. This worked perfectly fine on 13.0.x, but after upgrading to 13.1 I now receive the following error when the VM is being processed:
I've double-checked the backup job configuration and nothing has changed.Processing SERVERNAME Error: Source data for task SERVERNAME is missing.
Error: Source data for task SERVERNAME is missing.
Additionally, I tried running a Quick Backup of the VBR server, which exposed a second issue: during the Quick Backup process, all other VMs displayed the message:
This is unexpected, as all of those VMs are still selected and protected by the regular backup job."XXXX is outdated and its restore points will be subjected to deleted VMs retention."
I'll generate support logs and open a support case shortly. In the meantime I've to update some other VBR Servers...
Edit / Additional Context:
The backup job is using Storage Integration.
For troubleshooting purposes, I created a separate backup job for the VBR server. I know some would argue that's a best practice anyway, but the server had been backed up successfully as part of the existing job before the upgrade.
Interestingly, after creating a dedicated job for the VBR server with Storage Integration disabled, the backup completed successfully.
This seems to indicate that the issue may be related to Storage Integration in combination with VBR 13.1. I'll perform some additional testing with Storage Integration enabled on the dedicated job and report back with my findings.