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Outlook Desktop Sync Error Code 403, Because Two-Factor Authentication is Enabled


  • Error code in Outlook Desktop Sync, encountered when attempting to log in


  • Clio Manage
  • Outlook Desktop Application

Additional Information:

  • Full Error:
    "Unable to connect with Server.
    Status code: 403
    Internet Error: 0
    Couldn't log you in as ''. Please check your username and password."


  • The Outlook Desktop sync has been provided an invalid username and password, or something is causing the username/password to not be accepted


Temporarily disable Two-Factor Authentication in order to connect the Outlook Desktop Sync. Once the connection is complete, 2FA can be re-enabled.



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