Backup fails, reporting "'Script.bks' file not found."

Cause:  The Exchange Information Store is not running.

Solution:  Start the Exchange Information Store.

To start the Exchange Information Store

  1. Click Start, click Run, and then type Services.msc.

  2. In the details pane, right-click Microsoft Exchange Information Store, and then click Start.

Cause:  

  • A folder explicitly marked to be included in the backup is not on the system.
  • The Small Business Backup Script has been deleted or is corrupted.
  • The UNC path you are backing up to does not exist or is inaccessible.

Solution:  Re-run the Backup Configuration Wizard from the Backup snap-in in Server Management, accepting the defaults to reset.