mail.onmicrosoft.com

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O365 – How to add a mail.onmicrosoft.com smtp address using PowerShell

So you are on-boarding user mailboxes to Exchange Online and your user does not have a <domain>.mail.onmicrosoft.com smtp address. STOP. Your mailbox migration will fail without it. (Maybe you know this and this is why you are here 🙂 ) If you used the Exchange Hybrid Configuration Wizard, by default, […]