I looked at the actual Outlook.com screen ... hover on top left area then shows the weird account.
So, it therefore seems to be an Outlook.com problem and not Outlook 365.
How to fix this???
The "Outlook_ugly" address is because you have a non-Microsoft address set as primary on your Microsoft account. Set an outlook.com alias as primary and it will go away.
Microsoft has more information in this article:
Outlook.com email account appears as "outlook_[long series of letters and numbers]@outlook.com" in Outlook for Windows
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.