Office 365 account doesn't get e-mails in hybrid environment

Question

There's an o365 user whose mailbox does not get external emails. When I check both Office 365 and On-Premise environment, the mailbox type is like "user":

What can I do to solve this problem?

Thank you very much

Answer 1

No, the ExchangeGuid is not a proxy address.
The GUID is applied to the remote mailbox in step 7 of that doc

Answer 2

Depending on which mailbox you want to keep, follow:
https://learn.microsoft.com/en-us/exchange/troubleshoot/user-and-shared-mailboxes/mailbox-exists-exo-onpremises#scenario-1-keep-exchange-online-mailbox

Answer 3

Hi @Andy David - MVP ,

Thank you for replying me. Could I ask you a question?

On the step 6 (command Set-RemoteMailbox -Identity "user identity" -EmailAddresses @{add="x500:/o=First Organization/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=<user identity>"}), can I replace "x500" with "ExchangeGuid"?

And then run the command "Set-RemoteMailbox matheus@jaswant .com -ExchangeGuid "fe961utc-0ee9-4ffe-8df1-b61uy27t6dfe", right?

Thank you