Speeding Up Exchange 2010 Mailbox Moves

Performing Mailbox moves in Exchange 2010 can be a rather slow process, moving at 3-4GB an hour. If you’re migrating a large store this is a long period of time to wait. Here’s how you can speed up the process significantly. I’ve used these settings on several SBS 2003 to 2011 swing migrations including from a 2003 swing server running in Hyper-V on a SATA drive. If you’re moving from something beefier than that I would suggest bumping up the MaxActiveMoves settings accordingly.

On the server you’re migrating to edit MSExchangeMailboxReplication.exe.config located in your Exchange bin folder (by default: c:\Program Files\Microsoft\Exchange Server\V14\Bin)

Find the following default values:

MaxActiveMovesPerSourceMDB = “5″   
MaxActiveMovesPerTargetMDB = “2″   
MaxActiveMovesPerSourceServer = “50″   
MaxActiveMovesPerTargetServer = “5″   
MaxTotalMovesPerMRS = “100″

Change them to:

MaxActiveMovesPerSourceMDB = “7″   
MaxActiveMovesPerTargetMDB = “7″   
MaxActiveMovesPerSourceServer = “50″   
MaxActiveMovesPerTargetServer = “40″   
MaxTotalMovesPerMRS = “250″

Restart Microsoft Exchange Replication Service


Plugdin says:

Nice work, helped me out big time..

Brad says:

Fantastic thanks this REALLY helped with my 80 mailboxes (220GB store!)


Robert says:

Thanks for the information. You have saved me hours!!!!

Jeff says:

Can you suspend the move make the changes and restart the service and continue and existing move?

drnadmin says:

Yes, the changes you make should work after continuing the existing move.

Binu Kumar says:

Good Work , it works beautifully!!

Adding the Suspend and Resume commands in the same article would help many people.

Thanks for the advise,

Moving a 500+GB Exchange server with 1,5 million items. Interesting to see if this makes a difference 🙂

* Dustin says:

I’ve not used these settings on a mailbox store this large. However, as long as the source database and server are in decent shape, you should see a definite increase in the speed.

CoralBayCC says:

Any idea if this will work with Exchange 2013? I have to migrate a SBS 2008 to Server 2012R2 w Ex 2013 and this would be nice. It definitely helped all my SBS 2011 migrations.

Thanks so much!


* Dustin says:

Yes, this will work for Exchange 2013. Only difference is the folder is V15 instead of V14 in the path.

CoralBayCC says:

Thanks Dustin. This is the default for my Exchange 2013 installation, I just need to change the last entry.


Larry M says:

actually, the article says to restart the microsoft exchange replication service after making the changes, but it is the Microsoft Exchange Mailbox replication service that needs to be restarted for the changes to take effect.

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