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Remove Exchange Server 2016 Database DR site

Ibrahim hasan 61 Reputation points
2021-11-18T07:13:51.1+00:00

Hi there,

We have three Exchange 2016 servers. Two in main site and one DR site, in DR site C drive getting full because of mailbox database log files, this database doesn't have and mailbox.

Questions

Do I have do dismount this database to stop these logs? and it will stop

If I dismount this database will face any issues.

Thank you to all who reply.

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

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Andy David - MVP 160.3K Reputation points MVP Volunteer Moderator
2021-11-21T13:29:33.65+00:00

"Yes, these servers are DAG. As i mentions this server are used only in DR site and for mount the active mailbox database in main site. "

If there are no mailboxes in this database, then why even have it? Regardless, if there are no mailboxes in that database, you can dismount it safely, yes.

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  1. Joyce Shen - MSFT 16,706 Reputation points
    2021-11-19T06:49:21.66+00:00

    Hi @Ibrahim hasan

    Agree with Andy, and if your drive getting full because of the database logs, we could also follow the methods introduced in below links to reduce them.

    How to Cleanup, Truncate or Move Log Files in Exchange Server 2013/2016/2019?
    Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.

    Exchange Server deletes transaction logs whenever it completes a full backup.
    And if you enable circular logging, the transaction log is cleared right after the transactions have been moved to the database. Once the circular logging is enabled, then the additional log files are not created.

    And the method to Defrag an Exchange server

    Here is also a related thread discussed about the similar issue if you want to remove the database: Exchange - Safe to Delete unused Database
    Make sure you have moved the system mailboxes as well.

    If an Answer is helpful, please click "Accept Answer" and upvote it.

    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

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  2. Andy David - MVP 160.3K Reputation points MVP Volunteer Moderator
    2021-11-18T12:25:33.727+00:00

    Are these servers in the Database Avail Group?
    If so, you would need to remove the mailbox database copies in order to correctly stop this, not just dismount the database.

    IF this is a stand-alone server in the DR site, then yes you can dismount the database and it will stop log generation.

    IF there are NO mailboxes in this database, then it will be fine. - no issues

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