Transient error SourceMailboxAlreadyBeingMovedTransientException has occurred. The system will retry

Question

This keeps happening on 8 out of 10 moves. seemingly at random. Sometimes the transfer will pick up, other times it'll time out and will fail.

What can we do to fix this?

Answer 1

Any update on this issue ?

Answer 2

Hi Alan,

Do you have any update on this?

Best Regards,

Alison

Answer 3

Hi Alan,

Thank you for the response. Based on your environment, I'd like to collect the below information. Please send them to me via this private message.

Connect to Exchange Online PowerShell,

https://technet.microsoft.com/en-us/library/jj984289%28v=exchg.160%29.aspx?f=255&MSPPError=-2147217396

1. The Migration Batch information

Get-MigrationBatch | Export-CLIXML C:\Batch.xml

2. Output on a failing Move Request and a good one seperately:

Get-MoveRequest -Identity <Mailbox ID> | Export-CLIXML C:\Requestbad.xml

Get-MoveRequest -Identity <Mailbox ID> | Export-CLIXML C:\Requestgood.xml

3. Move Request Statistics on a failing Move Request:

Get-MoveRequestStatistics -Identity <Mailbox ID> -IncludeReport | Export-CLIXML C:\RequestStatistics.xml

Looking forward,

Alison

Answer 4

Allison,

The hybrid server is Version 15.0 ‎(Build 1236.3); the source server is Version 8.3 ‎(Build 83.6).

Re: the article you sent, we don't use the Forefront product at all.

I can send you detailed account info if you want to send me a private contact message?

Thanks!

Alan

Answer 5

Hi Amaca2,

Are you in a hybrid environment and trying to move mailboxes from on-prem to Office 365? I found one article for your reference, please kindly have a check:

Error message when you move mailboxes from an on-premises environment to Office 365: "Mailbox Move to the cloud fail with error"

https://support.microsoft.com/en-us/help/2654376/error-message-when-you-move-mailboxes-from-an-on-premises-environment-to-office-365-mailbox-move-to-the-cloud-fail-with-error

If it doesn't help, could you please let me know the detailed environment in your organization? Such as which migration type you are using now and what is the version and service pack installed on the mailbox server and hybrid server?

Thanks,

Alison