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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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