VSS errors using Veeam backup:
To disable local VSS data
Log onto VM as Administrator
Open Command Prompt as Administrator
Use vssadmin at the command prompt:
c:\Vssadmin list shadows
Which showed me what drive was using VSS
In the GUI though the drive was listed as shadow copies off but it still was using storage for VSS files.
Re-enabled VSS for that drive then immediately disabled it again which deleted the old VSS files and set me back to 0% used.
Alternatively I probably could have used vssadmin to delete the VSS files as well using the
c:\vssadmin Delete Shadows
c:\vssadmin Delete Shadow Storage
I ran a restart of COM+ services from services.mmc which restarted all the other dependencies as well.
I then reran veeam backup job and no more VSS errors.
However if the next backup fails with “failed to delete oib….” you will need to recreate the job, but you should not get the VSS errors anymore.