Memorise

How to speed up a large Exchange 2010 Migration

Throttling the Mailbox Replication Service

If you go to your CAS server and navigate to the c:\Program Files\Microsoft\Exchange Server\V14\Bin\MSExchangeMailboxReplication.exe.config file using a text editor such as Notepad, you will see the following settings at the bottom of the config file.

Essentially, these settings only allow 5 concurrent moves from the source database, 2 concurrent moves for the target database, 50 per sources server, and 5 per target server, and 100 moves per CAS server.  If you are running high-end disk or have plenty of IOPS to spare, you can change the settings to:

Once changed you must restart the MRS services on the CAS server.

source: http://technet.microsoft.com/en-us/library/ff963524.aspx

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