Ondrej Žilinec – IT Blog

When I migrate mailboxes between Exchange servers I increase numbers of move requests because two is really limiting in nowadays network and servers speeds.

All Exchange processes have their configuration files stored in directory C:\Program Files\Microsoft\Exchange Server\V14\Bin and *.config files. Process which is responsible for migrating is called MSExchangeMailboxReplication.exe and it’s configuration file is called MSExchangeMailboxReplication.config.

At the end of this file are some settings:

  <MRSConfiguration
    MaxRetries = “60”
    MaxCleanupRetries = “5”
    MaxStallRetryPeriod = “00:15:00”
    RetryDelay = “00:00:30”
    MaxMoveHistoryLength = “2”
    MaxActiveMovesPerSourceMDB = “5”
    MaxActiveMovesPerTargetMDB = “2”
    MaxActiveMovesPerSourceServer = “50”
    MaxActiveMovesPerTargetServer = “5”
    MaxTotalMovesPerMRS = “100”
    FullScanMoveJobsPollingPeriod = “00:10:00”
    MinimumTimeBeforePickingJobsFromSameDatabase = “00:00:04”
    ServerCountsNotOlderThan = “00:10:00”
    MRSAbandonedMoveJobDetectionTime = “01:00:00”
    BackoffIntervalForProxyConnectionLimitReached = “00:30:00”
    DataGuaranteeCheckPeriod = “00:00:10”
    DataGuaranteeTimeout = “00:30:00”
    DataGuaranteeLogRollDelay = “00:01:00”
    EnableDataGuaranteeCheck = “true”
    DisableMrsProxyCompression = “false”
    DisableMrsProxyBuffering = “false”
    MinBatchSize = “100”
    MinBatchSizeKB = “256” />
</configuration>

I think lines are explained by them selves. I usually increase two line to follwing values:

MaxActiveMovesPerSourceMDB = “10”
MaxActiveMovesPerTargetMDB = “10”
MaxActiveMovesPerSourceServer = “50”
MaxActiveMovesPerTargetServer = “50”

Now I spend about 5 times less time migrating mailboxes and servers are fine with this load.

Happy migration times 🙂