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Migration Stuck at syncing when migrating to O365 RRS feed

  • Question

  • I have started migrating a batch of single user(35GB) of size, after the migration reached 8 GB, i was stuck in Syncing state for almost 4 hours now.

    Provide a solution.



    • Edited by Prakashraaj Wednesday, December 18, 2019 12:09 PM
    Wednesday, December 18, 2019 12:05 PM

Answers

  • Hi,

    Any progress about your migration? Waiting for your update!

    Regards,

    Joyce Shen


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    • Marked as answer by Prakashraaj Monday, March 23, 2020 1:14 PM
    Wednesday, December 25, 2019 2:05 AM

All replies

  • I have started migrating a batch of single user(35GB) of size, after the migration reached 8 GB, i was stuck in Syncing state for almost 4 hours now.

    Provide a solution.



    I'd let it ride. Lots of items can take a long time.

    What does Get-MoveRequestStatistics <user> |FL show ?

    Wednesday, December 18, 2019 12:41 PM
  • Where i have to run this command, through exchange management shell?

    I am running batch from O365 admin portal.

    There are no errors in Users report. The user has archive enabled
    • Edited by Prakashraaj Wednesday, December 18, 2019 1:57 PM
    Wednesday, December 18, 2019 1:54 PM
  • Where i have to run this command, through exchange management shell?

    I am running batch from O365 admin portal.

    There are no errors in Users report. The user has archive enabled
    Yes, connect to Exchange Online Powershell to run this.
    Wednesday, December 18, 2019 1:58 PM
  • What should i need to check in the output?
    Wednesday, December 18, 2019 2:20 PM
  • What should i need to check in the output?
    It should show the progress of the move and no errors.
    Wednesday, December 18, 2019 2:28 PM
  • What should i need to check in the output?

    It should show the progress of the move and no errors.

    Status :InProgress

    Status Detail: StalledDueToSource_UnknownReason

    This is the output.

    Wednesday, December 18, 2019 2:32 PM
  • Hello,

    I would cancel the batch and try to migrate from powershell see if that works out:

    https://oddytee.wordpress.com/2015/06/30/moving-individual-mailboxes-to-office-365-via-powershell/

    Thanks,

    Niels

    Wednesday, December 18, 2019 2:55 PM
  • how about i stop the migration and resume it? would there be any data loss??
    Wednesday, December 18, 2019 4:06 PM
  • how about i stop the migration and resume it? would there be any data loss??
    There is no data loss if you pause, stop, resume or remove a move request or batch migration. 
    Wednesday, December 18, 2019 4:32 PM
  • Hello,

    You can use: 

    Stop-MigrationBatch -Identity MigrationBatch1

    More info:

    https://docs.microsoft.com/en-us/powershell/module/exchange/move-and-migration/stop-migrationbatch?view=exchange-ps

    Thanks,

    Niels

    Wednesday, December 18, 2019 4:59 PM
  • now it is stuck in "Starting" State
    Wednesday, December 18, 2019 5:56 PM
  • Hello,

    What output do you see when running

    Get-MigrationUser -BatchId "BatchName" | Get-MigrationUserStatistics

    Thanks,

    Niels


    Wednesday, December 18, 2019 5:59 PM
  • After we stopped and Resumed the Bath, for sometime it was in Starting state then it went Syncing State. Till now its in Syncing state. and the statusDetail is 

    Status          : InProgress
    StatusDetail : StalledDueToSource_UnknownReason

    After we ran this command, 

    Get-MigrationUser -BatchId "BatchName" | Get-MigrationUserStatistics

    The Status shows Syncing.

    Thursday, December 19, 2019 4:19 AM
  • Hi Prakashraaj,

    Find a similar issue here about your StatusDetail: Move requests stuck at StalledDueToSource_UnknownReason

    Try the solution provided in the thread above >>>>>>

    I got this working by below:-

    1. Asked MS to relax throttling limits. Initially I thought it'd be unnecessary for such small number of mailboxes.

    2. By running below on on-prem:

    New-ThrottlingPolicy MigrationO365Policy
    
    Set-ThrottlingPolicy MigrationO365Policy -RCAMaxConcurrency Unlimited -EWSMaxConcurrency Unlimited -EWSMaxSubscriptions Unlimited -CPAMaxConcurrency Unlimited -EwsCutoffBalance Unlimited -EwsMaxBurst Unlimited -EwsRechargeRate Unlimited
    
    Get-Mailbox | Set-Mailbox -ThrottlingPolicy MigrationO365Policy

    <<<<<<

    Regards,

    Joyce Shen


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    Thursday, December 19, 2019 5:49 AM
  • Thanks.

    I'll let you know once the status changes.

    Do i need to Stop the batch and resume it after i set the throttling policy? or should delete the batch and create a new one?
    • Edited by Prakashraaj Thursday, December 19, 2019 6:09 AM
    Thursday, December 19, 2019 6:05 AM
  • Hi,

    Any updates about your migration? We can just stop and resume it, however, if the migration still stuck, we may need to create a new one and verify the result again.

    Regards,

    Joyce Shen


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    Friday, December 20, 2019 8:48 AM
  • Still working on it . I'll update soon.
    • Edited by Prakashraaj Friday, December 20, 2019 10:20 AM
    Friday, December 20, 2019 10:20 AM
  • Hi,

    Any progress about your migration? Waiting for your update!

    Regards,

    Joyce Shen


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    • Marked as answer by Prakashraaj Monday, March 23, 2020 1:14 PM
    Wednesday, December 25, 2019 2:05 AM
  • Finally we removed the user and migrated. the migration was successul
    Thursday, August 6, 2020 2:21 PM