Get the new iPhone 15, iPhone 15 Plus, iPhone 15 Pro & iPhone 15 Pro Max from AT&T Now!
Protect yourself online

New Member


3 Messages

Saturday, November 7th, 2020 7:39 PM

2 of 3 addresses stopped working in Outlook365

have deleted the accounts in Outlook, changed the passwords,, and tried to set them up again, both automatically and manually and still don't work.  Very strange that I can't connect to the server with only 2 accounts.  Seems like an error like a change to the system a few years ago.

Community Support


221.4K Messages

3 years ago

Let's help you get logged in, @mblombardo!


Within the last few years, we have been upgrading the security of our e-mail system. If you are using Outlook 365 with AT&T domain e-mails, you will need to set up a Secure Mail Key to access your accounts safely.


If you are unable to log into MyAT&T while following these steps, you will need to reset your password


Let us know if this helps!


Donovan, AT&T Community Specialist

Not finding what you're looking for?