Q: How Do I Reset Permanent Touchstone Account Provider Settings?
My Touchstone authentication provider got set to an incorrect option, and set it to be remembered permanently. How do I change it?
If you have checked the box to always use a particular authentication method (Collaboration/Certificates), you can reset the permanent setting by going to: https://wayf.mit.edu/WAYF
Press Reset and now you can choose your authentication method again in your browser.
See also: How do I change my Touchstone preference for authentication by method?