Thats because the remote mailbox on-prem doesnt have the Exchange guid set:
Follow the steps here to fix:
https://learn.microsoft.com/en-us/exchange/troubleshoot/move-mailboxes/migrationpermanentexception-when-moving-mailboxes
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Hi All
i am using exchange 2016 hybrid envrionment. I have a shared mailbox in exchange online,(i.e this shared mailbox is directly created in online) i want to migrate it to onprem. When i perform the migration from onprem to online i am getting the below error. experts guide me how to fix it. if i convert this shared mailbox to regular mailbox will it work.
Cannot find a recipient that has mailbox GUID 'g5a98h09-7890-7juy-78ui-er567890opli'. --> Cannot find a recipient that has mailbox GUID 'g5a98h09-7890-7juy-78ui-er567890opli'.
Thats because the remote mailbox on-prem doesnt have the Exchange guid set:
Follow the steps here to fix:
https://learn.microsoft.com/en-us/exchange/troubleshoot/move-mailboxes/migrationpermanentexception-when-moving-mailboxes