What to do if VSS error appears?

To fix VSS error please do the following:

  • Run from cmd vssadmin list writers and check the state of VSS Exchange writer. If it is not stable, you should restart the following services:
    • Microsoft Exchange Information Store
    • Volume Shadow Copy
    • Microsoft Shadow Copy Provider
  • When it is done, please run one more test from installation folder via cmd:
C:\Program Files\Backup Manager> ClientTool.exe vss.exchange.check

If the result says that snapshot is created successfully, backup of Exchange will run fine