When you perform a Differential or Incremental backup of your Exchange Server, you receive one of the following:
Unable to attach to \\<ServerName>\Microsoft Exchange Directory. Unable to attach to \\<ServerName>\Microsoft Exchange Information Store.These errors can be caused by:
- You have never performed a Full Backup
- Database Circular Logging is enabled.
Use the Microsoft Exchange Administrator program to select the Exchange Server you want to backup.
Click File / Properties / Advanced tab and clear Database circular logging for Directory and Information Store
After you perform a Full Backup, you will be able to run a Differential and/or Incremental backup.
NOTE: Circular Logging causes the Exchange Server to overwrite the transaction logs, preventing the logs from being replayed after a restore.
NOTE: SBS enables Circular Logging by default.