Hi ,

Please check this thread and it may help you.

https://social.technet.microsoft.com/Forums/exchange/en-US/419116ad-24b5-4205-b514-944f7c88a13e/transient-error-when-attempting-to-move-mailbox-cross-forrest?forum=exchangesvradmin

Thanks,

I had looked at that article previously and adjusted some of the timeout settings, but that article is written for 2010 and the format of the file is different in 2013, so it's guesswork as to the correct entries to modify.  I have just increased the thresholds on the sending and receiving servers to match the below, restarted the MsExchangeMailboxReplication service on all servers and will resume the suspended move request to see if the problem is resolved.

    <binding
          name="MrsProxyClientTcpBinding"
          maxReceivedMessageSize="100000000"
          receiveTimeout="00:20:00"
          sendTimeout="00:20:00"
          transactionFlow="false"
          transferMode="Buffered" >          
          <readerQuotas maxDepth="256"
                  maxStringContentLength="35000000"
                  maxArrayLength="35000000"
                  maxBytesPerRead="4096"
                  maxNameTableCharCount="16384" />          
          <security mode="Transport">
            <transport
              clientCredentialType="Windows"
              protectionLevel="EncryptAndSign" />
          </security>
        </binding>        
      </netTcpBinding>      
      <customBinding>
        <binding name="MrsProxyClientHttpsBinding"
                 receiveTimeout="00:20:00"
                 sendTimeout="00:20:00">
          <reliableSession
                 inactivityTimeout="00:22:00"
                 maxRetryCount="15"                 
                 ordered="true" />
          <textMessageEncoding>
            <readerQuotas 
                  maxArrayLength="35000000"
                  maxStringContentLength="35000000"
                  maxDepth="256" />
          </textMessageEncoding>
          <httpsTransport authenticationScheme="Negotiate"
                          maxReceivedMessageSize="100000000" />
        </binding>

Cheers,

Chris

Hi Chris,

Below link has many troubleshooting steps that you can go through to figure out the issue.

As mentioned by you it seems like, link speed or the MRS proxy timeout issue.

Below are key extracts from the article:

1. The procedure to increase the timeout for the service through the file MRSProxy
File: MsExchangeMailboxReplication.exe.config
Object / line: DataImportTimeout.
New Value: 00:10:00

2. Try shell with Baditem and largedataloss field.

New-MoveRequest -Identity user@domain.com -Remote -RemoteHostName cas1.domain.com -TargetDeliveryDomain domain.mail.onmicrosoft.com -RemoteCredential $cred -BadItemLimit 20 -LargeItemLimit 10 -AcceptLargeDataLoss

3. Get more details:

You may find some additional info in the log by using the following:

Get-MoveRequest {email} | Get-MoveRequestStatistics -Diagnostic -IncludeReport | Export-Clixml logfile.xml

4.As far as the change to the "MSExchangeMailboxReplication.exe.config", it might have been increasing the export buffer (ExportBufferSizeOverrideKB) to 7500.

5. You can try this as well. Export the mails to PST, move the empty mailbox, and then import back the data into the migrated mailbox.

What do you have as Reverse Proxy [https://support.microsoft.com/en-us/kb/2654376]

or Load Balancer for CAS

Unable to migrate Mailboxes On-prem to Exchange Online due only to thisTransient error

Moreover, there is a similar thread for your reference:
http://community.office365.com/en-us/forums/148/p/151337/434991.aspx?PageIndex=1

Hi,

When attempting to move a 1.5GB mailbox to a remote site over one of our more congested high latency links (very remote site on satellite connection 1000ms +) the move request gets stick at the finalization stage with the follow error in the get-moverequeststatistics -includereport 

 11/05/2015 4:51:06 PM [SERVERNAME] Mailbox store finalization is complete.
 11/05/2015 4:51:09 PM [SERVERNAME] SessionStatistics updated.
 11/05/2015 4:51:09 PM [SERVERNAME] Verifying mailbox contents...
 11/05/2015 4:55:49 PM [SERVERNAME] Transient error
 TimeoutErrorTransientException has occurred. The system will retry (1/60).

This error loops continuously and locks the user out of their mailbox.

I suspect their is a timeout setting in MsExchangeMailboxReplication.exe.config file that I can adjust to resolve this issue but I am unable to find any reference to this specific error that would indicate what timeout is associated.

Any help would be greatly appreciated.

Chris

• Edited by Chris Kuplis Monday, May 11, 2015 7:07 AM