From any page on the UM-Dearborn site, click on Student One-Stop at the top of the page

On the Students page, there will be an announcement for the My UM-Dearborn portal. Click Log in to My UM-Dearborn

Enter your UMich login information (uniqname and password) to log in

Welcome to the My UM-Dearborn portal!
If you’re still having trouble accessing the portal, please contact One-Stop at 313-593-5300, umd-one-stop@umich.edu, or in 1145 RUC