AhsayOBM: 188.8.131.52 or above
When performing either a scheduled or manual MS Exchange database backup job. The following backup error are received in the backup report:
|*||info||...||Using Temporary Directory ...|
|*||erro||YYYY/MM/DD hh:mm:ss||Cannot start shadow copy, reason =VSS_E_UNEXPECTED_PROVIDER_ERROR|
|*||erro||YYYY/MM/DD hh:mm:ss||[VSSDatabaseExpt] ¢SS_E_UNEXPECTED_PROVIDER_ERROR|
C:\WINDOWS\system32>vssadmin list writers
This issue can occur if there is not enough space on the Exchange server to create a VSS snapshot of the database. In other words, the maximum size of the shadow storage area is too small.
To resolve this issue, consider to resize the maximum shadow storage area on the MS Exchange server.
Refer to the following Microsoft Document for details on how to resize the shadow storage area:
UNEXPECTED, PROVIDER_ERROR, VSSDatabaseExpt, shadow storage, resize, VSS Writer, Microsoft Exchange Writer