We run a 5 host VMware cluster and have power management enabled on 2 named hosts.
So hosts, 1,2 & 3 are ALWAYS up. Hosts 4 & 5 may be put in Standby mode if load is not high.
I'm seeing more and more of the following errors in Veeam...
Checking the license for the source host 'vmhost4.mycompany.uk'
Failed to validate license for the VM "MyVM".
Host with uuid "xxxxxx-xxxxxx-xxxxxx-xxxxxx" was not found
So, I'm guessing that when a backup job starts, Veeam collects the list of VM's to backup and also stores the host they're running on?
As the job progresses, if for example vmhost4 goes in to standby mode then when a VM which was on that host but has now been migrated to another host (lets say vmhost3) it seems it fails as it tries to validate the license for vmhost4 and can't contact it?
Funnily enough I never noticed any issue with this using v4.1.2 but maybe that was just luck?
I hope I'm wrong, as this means we won't be able to use Power Management and as we're an environmental organisation - that doesn't look good

Cheeers... allan.