Exchange 2010 gives us two methods to monitor our DAG, the first method is using the Exchange shell command utility which is powered by PowerShell and the second is using the graphical interface
which is the Exchange Management console.
First method: Exchange management shell.
This command gives the status of all databases on all mailbox servers.
This one gives us all the status information for a specific mailbox server.
This one gives us status information for specific mailbox database.
This command run set of tests to test the replication health.
This will run against a specific mailbox server.
This method provides much less information but can assist to find other problems.
To access the GUI tool Open the Exchange management console -> Organization Configuration – > Mailbox
Click on the Database Management and click on the database you need to monitor.
Click on properties.
Here you can see the replication copy status and the database status.
This will show you if the database is seeding and if there are errors.
Its recommended to script the commands with refresh timer to view the status of the replication.
You can view the other Exchange 2010 articles here.