Can keep Circular logging enable while third party Backup is deployed on Exchange Servers

Question

Hello,

We have Exchange Server 2019 DAG, initially we enabled circular logging on all DBs, and recently we deployed third party Backup solution which is taking backup of complete Exchange Server + Information store, as we know that each backup is also truncate the DB logs.

So is it best practice to keep circular logging enabled or we should disable it.

Thanks

Answer 1

If you are doing backups, then there is no reason to have circular logging enabled.

Conversely, if you have circular logging enabled, there is no reason to do backups for a DAG

https://learn.microsoft.com/en-us/exchange/high-availability/disaster-recovery/disaster-recovery?view=exchserver-2019

Answer 2

Hi @IT Engineer，

In general, we do not recommend enabling circular logging in Exchange Server.

You can refer to and compare whether the following scenarios apply to your current situation and decide whether to enable circular log ：

• The disk is getting full, and you are not able to expand the disk.
• There are problems with the backup software, and the logs are increasing.
• Migrating mailboxes to that particular database.
• The database is configured in a test environment.

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