Slow mailbox move in exchange 2010 sp1

Recently I was engage in a project of migrating Exchange 2003 environment to Exchange 2010. User was having around 500 mailboxes on various capacities. During the mailbox migration process we found out the process was extremely slow. 500 MB mailbox transfer took more than 20 minutes!

Doing some search around found out this is a due a recent change on the Exchange 2010 SP1. The value of “MaxActiveMovesPerTargetMDB”  was change from 5 to 2. This means only 2 mailboxes can be migrated simultaneously Sad smileNot a good idea and so far no idea why Microsoft did that. You can edit this value in “MSExchangeMailboxReplication.exe.config” to 5 from 2.

Open the above mention file from a notepad and locate the entry of MaxActiveMovesPerTargetMDB and change the value.


Once you do that you have to restart the Microsoft Exchange Mailbox Replication service in HUB CAS servers. Try doing the Mailbox moving and you’ll find the difference.

Note: This information specifically given “AS IS” there is no such documentation found in official in Microsoft web site.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.