How to Change Primary Email for a User in ExO Without Altering UPN?
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MagicDragon7
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!
Answers
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!
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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.
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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?
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MagicDragon7: 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?