Wiki, Guest User Password Reset
Guest users added to the wiki will need to manage their passwords directly from the Illinois Wiki application
Guest User Password Reset
Guest users can reset their password by visiting the following URL:
In order to complete a password reset, the guest user must enter their email address exactly as it appears on the space permissions page. The Wiki service will then send a temporary password to the guest user's email account.
(From here: https://wiki.illinois.edu/wiki/display/HELP/Managing+Guest+Users+for+Your+Space)