Backup Exec: Exchange Incremental Backup Issue: Circular Logging Enabled – KB10391860


Description:  Exchange Incremental backup jobs are failing due to circular logging being enabled. Circular Logging will be enabled if the drive is low on disk space (about 10% or less)

Common customer description: What causes this issue?

How do you fix this issue?

Probing questions: Do you know the reason for circular logging being enabled?

Steps to isolate: Check disk space – if the disk space is low (about 10% or less), that could explain why it’s enabled

Steps to resolve:

1. Connect to the server

2. We need check to see where the exchange database is located on. Also check the disk to see how low it is.

  • Go to the Exchange Management Console (located on the Exchange server or the SBS server)
  • To locate the database, on the left pane, go to Microsoft Exchange On-Premises>>Organization Configuration>>Mailbox


  • Right-Click on the Mailbox Database and click on Properties


  • On the General Tab, it will shows the database path. Make a note of which drive the database is located on. In this case, it’s the E:

Database path

3. In order to know if you should disable it or leave it be can be tricky. Consult your backup solution and make sure you can enable it.


Leave a Reply