Ran into a scenario where I have a failed migration batch that semi moved an Exchange 2013 user to O365. The mailbox did not migrate the data but did is currently working an receiving email. You can log into portal.office.com and click on mail and you will login to the users inbox and all incoming mail from the internet comes to this account. If a on-prem users sends email to this user it will go to the mailbox that is still on the on-prem Exchange. I remember running into this awhile back and I had a powershell command that I could tell on-prem Exchange that the user is now located on O365, however I can't find it searching isn't turning up the correct result. If you look at the on-prem EOA it shows the user as a local mailbox still compared to some of the O365 mailboxes. At this point we have a full extract of the email account and I would like to force the local Exchange to delete the mailbox and look at O365. Can anyone refresh my memory?
Thank you in advance