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Office 365 Email and Calendaring - Configure via IMAP Settings

If you have just had your mailbox migrated to Office 365 Email and Calendaring, see the Post-Migration and Modern Authentication Office 365 Email and Calendaring Setup page for how to get up and running.
This article refers to the Office 365 Email and Calendaring. If you're looking for Exchange Email and Calendaring on the Exchange On Prem Server, see: MIT Email Setup Landing.

If you're not sure which system you're using, see: How do I tell if my email and calendaring data is on the Exchange On Prem Server or using Office 365?


Some email clients, such as Thunderbird, Evolution and Pine, require you to connect to your email server via the IMAP protocol. These are the IMAP settings you need to use for Office 365 Email and Calendaring.

  • Username:
  • Server:
  • Server type: IMAP
  • Port: 993
  • Encryption method: SSL/TLS
  • Authentication: OAUTH2


  • Outgoing server:
  • Port: 465 or 587
  • Connection type: SSL
  • Authentication: Normal password

See Also:

IS&T Contributions

Documentation and information provided by IS&T staff members

Last Modified:

March 08, 2023

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