Exchange Hybrid Mailbox Migration Failing

If it is a new user try enabling it as remote mailbox. Please check this article.
https://www.experts-exchange.com/articles/34991/Convert-to-remote-mailbox-and-fix-mail-flow-after-soft-matching-hard-matching.html

Enable-RemoteMailbox user -RemoteRoutingAddress user@org.mail.onmicrosoft.com

ASKER

But that was created in AAD/365 and then relied on ADC to sync it..?

Would option 2 here be worth a go?
Hybrid Exchange mailbox On-boarding : Target user already has a primary mailbox - Fix » multicastbits.com

Did yuo trying running the command?

Enable-RemoteMailbox user -RemoteRoutingAddress user@org.mail.onmicrosoft.com

ASKER

Have resorted to deleting the user account on prem, synching the removal with ADC and re-creating new user/mailbox and attemtping sync.

I now get 'matches multiple entries' on a new-moverequest command

ASKER

Yes and the command fails:

Enable-RemoteMailbox user -RemoteRoutingAddress ynyjhtbnt@tenant.mail.onmicrosoft.com
Enable-RemoteMailbox : The term 'Enable-RemoteMailbox' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify
that the path is correct and try again.
At line:1 char:1
+ Enable-RemoteMailbox user -RemoteRoutingAddress ynyjhtbnt@tenant ...
+ ~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (Enable-RemoteMailbox:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException

-->Yes and the command fails:

Are you running this command from EMS?

-->I now get 'matches multiple entries' on a new-moverequest command

Remove-MoveRequest -Identity 'user@domain.com'

This will remove all the move-requests.

Get-MoveRequest | remove-moverequest

ASKER

Ran from PowerShell connected to Exchange online.

ASKER

Getting the same error: multiple entries.

Yuo have to run from Exchange Onprem Shell.

Locate the affected user account and then right-click on it and click “Properties”
Click on attributes tab and then click on the “Filter” button and click “Show only attributes that have values”
Then scroll down the attributes and search for the following entries and clear the values.
msExchMailboxMoveFlags
msExchMailboxMoveStatus

Please be careful while dealing with attributes. Please make sure you have a successful backup of DC.

ASKER

msExchMailboxMoveFlags
msExchMailboxMoveStatus

Both are blank.

ASKER

remove-request command fails with multiple entries.

What about msExchMailboxMoveBatchName and msExchMailboxMoveRemoteHostName?