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Deleted's avatar
Deleted
Aug 11, 2023

Exchange 2013 to 2019 mailbox migration issue - StalledDueToTarget_MdbAvailability

Hi all,

 

Some info first:

Migrating users from Exchange 2013 (DAG) to Exchange 2019 (DAG).  Have migrated all arbitration and user mailboxes except one.

 

This one user mailbox is 22GB in size, but isn't the biggest that has been migrated.

 

Using new-moverequest to move.  It sits at Stage: CreatingFolderHierarchy. Percent complete: 10 for a long time, and occasionally has status StalledDueToTarget_MdbAvailability.  By long time I mean I started it Friday night and it was at that stage Monday morning.  I have removed and retried the move request with the same result

 

Running get-moverequeststatistics with report occasionally shows this:

Relinquishing job because of large delays due to unfavorable server health or budget limitations with a request throttling state 'StalledDueToTarget_MdbAvailability'.

 

The 2013 and 2019 servers show as healthy. CPU and RAM usage is low. At least 60% free disk space on all drives.

 

Various health commands (test-mrshealth, test-replicationhealth) pass for all servers.

 

Here is the latest message from get-moverequeststatistics with report:

Request processing continued, stage CreatingFolderHierarchy.
Stage: CreatingFolderHierarchy. Percent complete: 10.
Initializing folder hierarchy from mailbox '811ba64d-9bdf-4f72-b10d-8c203b0202d0 (Primary)': 218 folders total.
Folder creation progress: 0 folders created in mailbox '811ba64d-9bdf-4f72-b10d-8c203b0202d0 (Primary)'.

 

Does anyone have any clues about why this one mailbox won't migrate?

 

thanks

 

jc

2013
2019
Exchange Server
  • TAE_YOUN_ANN's avatar
    TAE_YOUN_ANN
    Aug 22, 2023
    Let me make one suggestion
    After backing up the problematic mailbox to PST using Outlook
    Create a new mailbox and connect it to Outlook to restore PST!
    • Deleted's avatar
      Deleted
      Aug 16, 2023

      Thanks for the reply TAE_YOUN_ANN 

       

      I've moved bigger mailboxes to the same database, so had to increase the values for our admittedly too big mailboxes.

       

      Both servers have 2 databases. I tested by trying to move the mailbox to the other 2019 database but got the same result.

       

      I tried another test, moving the mailbox to the other 2013 database. Initially it got to 95% and failed with too many corrupt items. I removed the request before seeing that I needed it there to find out what the items were. I started the move again and it completed successfully the second time!

       

      I am now trying to move it again to 2019 but after 4 hours it is again stuck at:
      Stage: CreatingFolderHierarchy. Percent complete: 10.
      Initializing folder hierarchy from mailbox
      Folder creation progress: 0 folders created in mailbox

       

      It doesn't have have the previous StalledDueToTarget_MdbAvailability message though, nor any other message about why it has stalled.

       

      EDIT: I have run the mailbox repair request on the users mailbox (in detect only mode) and it didn't find any issues.

      • Deleted's avatar
        Deleted
        Aug 16, 2023

        I tried migrating just using the GUI (Recipients/Migration) but it also seems to stall.  After 14 hours it is still just syncing.

         

        EDIT: Finally got the failure notice with basically the same but a twist highlighted in bold:

         

        [EX01] The Microsoft Exchange Mailbox Replication service 'EX01' (15.2.1258.12 caps:3FFFFF) is examining the request.
        [EX01] Connected to target mailbox '811ba64d-9bdf-4f72-b10d-8c203b0202d0 (Primary)', database 'MailboxDatabase01', Mailbox server 'EX01' Version 15.2 (Build 1258.0).
        [EX01] Connected to source mailbox '811ba64d-9bdf-4f72-b10d-8c203b0202d0 (Primary)', database 'MailboxDatabase04', Mailbox server 'EX02' Version 15.0 (Build 1497.0), proxy server 'ex02' 15.0.1497.43 caps:0400001F7FFFFFCB07FFFF.
        [EX01] Request processing continued, stage CreatingFolderHierarchy.
        [EX01] Stage: CreatingFolderHierarchy. Percent complete: 10.
        [EX01] Initializing folder hierarchy from mailbox '811ba64d-9bdf-4f72-b10d-8c203b0202d0 (Primary)': 218 folders total.
        [EX01] Folder creation progress: 0 folders created in mailbox '811ba64d-9bdf-4f72-b10d-8c203b0202d0 (Primary)'.
        [DR-EX01] '' suspended move request.
        [EX01] Suspending job.
        [EX01] Relinquishing job.

         

        DR-EX01 is the second 2019 server (DAG'ed with EX01).  Replication status is good between the two.

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