In this article, we will learn how to add database copy in Exchange Server 2019. After you configure the Database Availability Group (DAG). You need to add a database copy to the mailbox databases. When we update our Exchange Server or when it fails for any cause, the mailbox databases will stay active. To get more information learn Microsoft Documents to add a database copy in Exchange 2019
Add mailbox database copy using Exchange Admin Center
Sign in to your Exchange Admin Center. Go to the server’s option and then click on the databases tab. In this instance, there are three mailbox databases mounted on our Exchange Servers. You can see that the exchange servers with copies show the same Exchange Server hostname as the one it is active on. That means that the database copy is not configured on all of them.
Add database copy Exchange Server
Log in to Exchange Admin Center and then select the Servers option.
Click on the Databases tab, click on the “…” icon, and then select Add database copy.

On the add mailbox database copy window, click on the Browse…, button to select the Mailbox server that will host the database copy.

Choose the mailbox server to which you need to add a database copy and then click ok.

Action preference number choose 2 and then click the save button to add the database copy.

The process will start with creating a mailbox database and database log files on the Exchange Server that you have specified. Once done click close

Click on the refresh button in the toolbar or refresh the page. The exchange servers with copies column show that the mailbox database copy is on Exchange Server EX2019-01 and EX2019-02. The mailbox database is active on EX2019-01.

You can now see the file paths on the exchange server to which you are adding the database copy, and you will also see that transaction log files are copied across.

To check the database copy health, type the following command.
Get-MailboxDatabaseCopyStatus

Get-MailboxDatabaseCopyStatus "EXCHDB" | ft -auto

Conclusion:
In the above steps, we have learned how to add a database copy to Exchange Server 2019. You can add the mailbox database copies for each mailbox database on your other Exchange Server.


