Basically Veeam works very well when backuping up MSSQL 2014 nodes, but when you're having the vCenter database also running on the same AOG, I ran into the problem that Veeam wasn't able to backup the machines because of the VSS error “VSSControl: Failed to freeze guest, wait timeout”:
Ofcourse the database was added to the "SQL Databases Exclusions"-list, but this did change nothing - it just keeps failing and failing: (Veeam detected the DB data itself fully automatically)
After investigating the problem further, I finally found out (more detailed in german language on my site http://pkern.at/veeam-vsscontrol-failed ... it-timeout)
, that Veeam seems not to be able to understand, that there is a AOG behind the DNS name in the exclusions list. So when I manually add the nodes behind that Always-On-Group manually to the list, like that:
After that the backups works fine again!
I don't know if this is just an issue on my side, an already known issue, or any sort of a bug, but I wanted to share it in the Veeam forum anyway. Maybe someone runs also into a similiar issue someday...