Access to email in Office 365 is protected through multifactor authentication. If you have not enrolled a device to perform secondary authentication with before your Duo enrollment period expires, you will be unable to access your email and enroll a device.
You must contact the UWM Help Desk to be temporarily granted access to the Duo Dashboard. Here, you can add a mobile device or hardware token to use as a secondary authentication method. The instructions to add a mobile device can be found here. The instructions to add a hardware token can be found here.
You can contact the UWM Help Desk at (414) 229-4040, toll free at (877) 381-3459, or submitting a help request online at http://gettechhelp.uwm.edu.