If you’re still using classic Outlook, you might run into a frustrating email bug.
Microsoft has confirmed an issue where messages fail to send with a permission error, especially if your Outlook.com account is used alongside a Microsoft 365 account.
The problem is linked to how contacts are handled between accounts, and it’s more common in mixed profiles. For now, Microsoft suggests workarounds like changing the sender address, removing certain address book entries, or adjusting admin settings.
You can also try using Outlook on the web or creating a separate profile.
If nothing works, Microsoft is nudging users toward the new Outlook app while it works on a fix.
Mayank Parmar
