The default values are as follows
MaxActiveMovesPerSourceMDB = “5″ MaxActiveMovesPerTargetMDB = “2″ MaxActiveMovesPerSourceServer = “50″ MaxActiveMovesPerTargetServer = “5″ MaxTotalMovesPerMRS = “100″I changed my values to
MaxActiveMovesPerSourceMDB = “10″
MaxActiveMovesPerTargetMDB = “10″
MaxActiveMovesPerSourceServer = “50″
MaxActiveMovesPerTargetServer = “40″
MaxTotalMovesPerMRS = “250″
After you have made these changes restart the Microsoft Exchange Mailbox Replication Service after you refresh you move request window you should see 10 mailboxes moving at the same time.