I have Exchange 2010 SP3 on vmware and we have been using Veeam for the last 2 years. We recently upgraded from SP1 to SP3 in our Exchange and after a couple of weeks, the backups have started to fail. They are successful if I turn VSS off but I know there is no point in doing that. I even rebooted the server but still no luck. Any idea what could be the problem ?