Known Error: UMUC Single Sign-on (SSO) Systems: Login Error

User-added image
If you are presented with the login error while attempting to log into a UMUC system with Single Sign-on authentication, please clear your browser's cache, cookies, and temporary internet files to resolve the problem. 
Please do not use bookmarks that you may have created for UMUC services. 

If you are having trouble accessing your class through, please try logging into class at See also: LEO Browser Requirements

Clear Browsing Data on a Windows Computer:

Clear Browsing Data on a Macintosh Computer:

Clear Browsing Data on Mobile Devices: