OllieJC

I was having issues with new SSO users signing in and being redirected to the sign-out receiving an error message of "Users with the email address ... are not allowed to sign up for this help desk".

The issue turned out to be the blocklist in the Admin > People > End users section.

It'll be good to add a note here that the blocklist applies to new user accounts accessing via JWT as this wasn't intuitive (and the blocklist help text only mentions ticket creation).