I'm working in a hybrid environment where I have no on-prem Exchange, only Azure Active Directory (AD) synced to Exchange Online (ExO). I need to update a user's primary email from [email protected] to [email protected], but I'd like to keep their User Principal Name (UPN) as [email protected]. I've tried modifying various attributes in AD and forced syncs, even using capital letters for the SMTP. However, nothing has worked so far. Any suggestions would be really appreciated!
3 Answers
You mentioned using capital SMTP addresses. Ensure you set the primary like this: SMTP: and then smtp:. Did you verify where the capital ones were added?
Are you changing the actual mailbox? Because if you're just looking to alter the primary SMTP address, that can be a bit tricky in a hybrid setup. Just confirming what you mean here.
Make sure you're adjusting the ProxyAddresses properly, as that’s what controls the primary address and any aliases. Just a tip for those settings!
No, I'm not looking to change the mailbox itself, just the primary SMTP. I suppose that could be considered changing the mailbox in a way?