File 'Guid' not found for exchange database

OS

Windows

Software

5.5.1.0 - 5.5.8.0

Error message

File 'Guid' not found for exchange database 'SBS\Microsoft Information Store\First Storage Group\Mailbox Store'

Cause

This means dat the Guid-file is missing from the online backup or corrupt.
This can be caused by two backups tasks running simultaneously causing overlap.
Example: A new backup starts when the old one has yet to finish uploading.

Solution

• Schedule the database backups with enough time between them so they don't overlap.
• Change the backup schedule and check the box 'Skip backup when backup is still active'. (post 6.7.0.0)
• Uncheck the option 'Run this backup on this machine' option at the backup schedule and save the settings.
  Start a manual database backup of the Exhange-set.
  After this backup has completed don't forget to re-check the 'Run on the machine' option and saving the settings.
  This will upload the guid file without being interrupted by the scheduled backup task.