Exchange Mailbox Migration in DAG

Hi Team,

Can you please suggest the best options to split Database in 2 while in DAG.
I have a single Database and i need to move important users to another new database.
The current database is in DAG and if i move the mailbox to another database while in DAG is there any issue or do i need to remove the DB from DAG and then move.

Awaiting your suggestion.

Exchange version is 2013
Raneesh AIT EngineerAsked:
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You can move mailboxes across active databases within single DAG or even between two DAGs or between DAG member and standalone member, technically its simple mailbox move from one database to another

To split single database, you can create new database in same DAG on one server, add database copy to another server and then start moving selected databases to this database

Note that source database drive letter must be available on target database server with empty drive to add database passive copy
Senior IT System EngineerSenior Systems EngineerCommented:
No, there won't be an issue.

The mailbox migration can be done even during the business hours using ECP or PowerShell.

Edward van BiljonMessaging and Collaboration Technical Lead (Exchange MVP)Commented:
Hi there

you can do the mailbox move very easily, if you prefer powershell you can move the mailbox using this command:

New-MoveRequest -Identity USer1 -TargetDatabase Store1 or you can use the EAC to do the move.

Just remember to clear the move requests once done, you can do so using this command:

Get-MoveRequest -status completed | remove-moverequest
Raneesh AIT EngineerAuthor Commented:
Thanks Team for your help.

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