User Login Change and DUO for Office 365

Your username configuration changed.

Your CSUF app login used on applications such as Office 365, Outlook email, Adobe Creative Cloud, and more, is currently configured using [username]@ ad. . The configuration changed from to .

DUO 2FA required for Microsoft Office 365 login

DUO Two-Factor Authentication (2FA) will be required when logging in to applications which require Microsoft login. This is to expand the use of Duo security to other applications such as Word, Excel, Outlook, Adobe Creative Cloud, etc

Which apps are affected?

Below is a list of affected apps:

  •  Outlook (PC, Mac, iOS, Android)
  • Microsoft Office desktop, mobile, and online apps (e.g., Word, Excel, PowerPoint, OneNote, MS Teams)
  • Other Web Apps (e.g.,, Adobe Sign, and Smartsheet)
  • Adobe Creative Cloud
  • Splashtop
  • Skype for Business

Apps we no longer support
Please use Outlook Mobile Apps downloaded on the Apple App Store and Google Play Store

  • iOS mail
  • Android mail
  • Thunderbird


Please note that you cannot update your apps until AFTER the change has been made to your account. Please contact the IT Help Desk at  helpdesk@fullerton.eduOpens in new window  or 657-278-7777 if you have any questions about when the change is happening for your account.

Need Help?

Faculty/Staff IT Help Desk
Call: 657-278-7777

Student IT Help Desk
Call: 657-278-8888