Office 356 Migration Completion of One Mailbox Taking Forever

Question

Hi Everyone,

I manually triggered the completion of a migration batch (Exchange 2016 -> O365) consisting of one large mailbox (10GB) and its associated online archive (22GB) this morning at 8:30AM and as of 9:30PM it is still in the "Completing" status.

The Get-MoveRequestStatistics report I just ran gives the following status information:

Status: InProgress
StatusDetail: ContentVerificationFinalSync
SyncStage: FinalIncrementalSync
Flags: CrossOrg, Pull
RequestStyle: CrossOrg
Direction: Pull
IsOffline: False
Protect: False
DoNotPreserveMailboxSignature: True
Priority: Normal
WorkloadType: Onboarding
Suspend: False
SuspendWhenReadyToComplete: False
IgnoreRuleLimitErrors: False
RecipientTypeDetails: MailUser
SourceVersion: Version 15.1 (Build 2106.0)

The Last lines of the Report Activity are the following:

3/18/2021 7:09:33 PM [SJ0PR14MB4806] Bad item retry has started.
3/18/2021 7:09:33 PM [SJ0PR14MB4806] Bad item retry completed. Details: RetryDisabled : 26.
3/18/2021 7:09:33 PM [SJ0PR14MB4806] Bad item retry has started.
3/18/2021 7:09:33 PM [SJ0PR14MB4806] Bad item retry completed. Details: RetryDisabled : 4.
3/18/2021 7:10:07 PM [SJ0PR14MB4806] Folder hierarchy changes reported in source '[redcted].onmicrosoft.com\f1f8f85d-caf3-4f44-aeeb-71b1f488f405 (Archive)': 0 changed folders, 0 deleted folders.
3/18/2021 7:10:29 PM [SJ0PR14MB4806] Total content changes applied to mailbox '[redacted].onmicrosoft.com\f1f8f85d-caf3-4f44-aeeb-71b1f488f405 (Archive)': New 0, Changed 0, Deleted 0, Read 0, Unread 0, ItemUpdates 0, Skipped 0, Total 0.
3/18/2021 7:10:34 PM [SJ0PR14MB4806] Incremental Sync '[redacted].onmicrosoft.com\f1f8f85d-caf3-4f44-aeeb-71b1f488f405 (Archive)' completed: 0 hierarchy updates, 0 content changes.
3/18/2021 7:10:35 PM [SJ0PR14MB4806] Stage: IncrementalSync. Percent complete: 95.
3/18/2021 7:10:35 PM [SJ0PR14MB4806] Final sync has started.
3/18/2021 7:14:06 PM [SJ0PR14MB4806] Folder hierarchy changes reported in source '[redacted].onmicrosoft.com\4791cd19-a09f-4e1c-bb4d-fd7d3dcf20a8 (Primary)': 0 changed folders, 0 deleted folders.
3/18/2021 7:19:31 PM [SJ0PR14MB4806] Total content changes applied to mailbox '[redacted].onmicrosoft.com\4791cd19-a09f-4e1c-bb4d-fd7d3dcf20a8 (Primary)': New 2, Changed 7, Deleted 0, Read 0, Unread 0, ItemUpdates 0, Skipped 0, Total 9.
3/18/2021 7:21:58 PM [SJ0PR14MB4806] Incremental Sync '[redacted].onmicrosoft.com\4791cd19-a09f-4e1c-bb4d-fd7d3dcf20a8 (Primary)' completed: 0 hierarchy updates, 9 content changes.

3/18/2021 7:27:41 PM [SJ0PR14MB4806] Source mailbox information:
Regular Items: 80621, 9.605 GB (10,313,565,647 bytes)
Regular Deleted Items: 4903, 942.6 MB (988,435,405 bytes)
FAI Items: 1811, 5.651 MB (5,925,344 bytes)
FAI Deleted Items: 23, 205.9 KB (210,855 bytes)

3/18/2021 7:29:07 PM [SJ0PR14MB4806] Source archive mailbox information:
Regular Items: 104858, 22.33 GB (23,971,294,893 bytes)
Regular Deleted Items: 263, 16.04 MB (16,819,730 bytes)
FAI Items: 4, 6.263 KB (6,413 bytes)
FAI Deleted Items: 0, 0 B (0 bytes)

3/18/2021 7:29:07 PM [SJ0PR14MB4806] Bad item retry has started.
3/18/2021 7:29:07 PM [SJ0PR14MB4806] Bad item retry completed. Details: RetryDisabled : 26.
3/18/2021 7:29:07 PM [SJ0PR14MB4806] Bad item retry has started.
3/18/2021 7:29:07 PM [SJ0PR14MB4806] Bad item retry completed. Details: RetryDisabled : 4.

Is it normal for a completion to take this long? Are there any auditing or logging options I can use to gain more insight into what's going on? It's not cool for an Executive to be locked out of his email for an entire day.

Thanks for any help!

Answer 1

Hi @Tom Vanden Bosch ,
How did you migrate?

According to the status: InProgess, explain that the migration is in progress. There are many factors that affect the migration, such as the network, the size of your own mailbox, etc. Considering your large mailbox, the speed of the migration may be affected. You could run the following command to view the detail about migration. The "PercentComplete" parameter can indicate the percentage that has been completed. You can refer to this parameter to see if the migration is in progress.

Get-MoveRequestStatistics -Identity <> -IncludeReport | fl  

I noticed that a bad item appeared during your migration, you could run the following command to fix the items in the source mailbox, and try the migration request again. Or run the second command to set the bad item limit.

New-MailboxRepairRequest  
Set-MigrationBatch –BadItemLimit   

For more information: Set-MigrationBatch

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