Pre-order the New Samsung Galaxy Z Flip4 & Galaxy Z Fold4 and, for a limited time, get twice the storage and a free case!
Need to update email settings?
reynaldj's profile

New Member


1 Message

Wed, Jun 29, 2022 11:25 PM

Set up email with office 365

I am not able to set up my email with office 365. It was set up for many years and suddenly it stopped to send and receive..

Accepted Solution

Official Solution


Community Support


196.2K Messages


We want to help get your email set up, !


What computer operating system are you using for Office 365? You may need to Set Up or Update AT&T email for your system. We recommend using the drop-down menu from the article to choose your operating system for detailed, accurate, and the most up-to-date instructions on setting up your email.


You may also need to set up Open Authentication, or OAuth, for extra security. If this isn't something you want to do right now, we suggest creating a Secure Mail Key, which lets you:

  • Access your AT&T Mail using your favorite email apps  
  • Synchronize other account info, such as your calendar and contacts, to your email app.

To creat a Secure Mail Key, please follow these steps:

  1. Go to Profile and choose Sign-in info.
  2. Select the email account that needs a secure mail key. (You’ll find a menu at the top if you have multiple accounts.)
  3. Scroll to Secure mail key and select Manage secure mail key.
  4. Choose the email address that you’d like to use, if you have more than one.
  5. Select Add secure mail key and then enter a nickname for the secure mail key to make it easier to recognize.
  6. Choose Create secure mail key.
  7. Select Copy secure mail key to clipboard. Make a note of your secure mail key, so you have it handy if you need to update an email app on several devices.
    - For security purposes, the secure mail key only displays until you select OK. 
    - If you lose or forget the secure mail key, you can create new secure mail keys.
  8. Select OK.
  9. Go to your preferred email app and replace the existing password with your secure mail key. For an IMAP account, delete the existing password for both the IMAP and SMTP servers and replace them with your secure mail key.

Please let us know if these steps helped, we're happy to assist.


Jennifer, AT&T Community Specialist

Need help?
New to AT&T Community?
New to the AT&T Community? Start by visiting the Community How-To.
New to the AT&T Community?
Visit the Community How-To.