Mix Windows 2012 & 2012 R2 in B&R environment?

[perola]

Is there any dos and don'ts regarding mixing Windows Server 2012 and 2012 R2 in Veeam backup environment?

Can I have Veeam backup server and repository based on Windows Server 2012 R2 and Hyper-V cluster I backup on Windows Server 2012? Or do all need to be on same version? In my case repository will also use Windows 2012 (R2) Deduplication.

[Shestakov]

Hello,
It depends on the type of Proxy Server deployment you have. If you use on-host deployment, Backup Server and Proxy Server can use different OS; but, if in a case of off-host deployment operating systems should be same. Backup repository can have any OS. Here is a similar question.

By the way, before using Windows Server 2012 R2 for Veeam Backup Server, make sure Veeam Backup & Replication 7.0 R2 Update is applied.
Nikita

[foggy]

Just keep in mind, that if you're willing to use off-host backup, off-host proxy should be installed on a host that has the same OS version as the Hyper-V host itself (and that is not a part of a cluster).