Continuing the discussion from SSO add_groups should be case-insensitive:
Hey, @neil. My client upgraded Discourse and the SSO group loads stopped working. SSO debug logs show that the group names (that contain caps) are getting passed. I see that the group names are getting downcased when they come from SSO, but is that Group.where clause case insensitive?
https://github.com/discourse/discourse/commit/3de45ce0cd3671e9bc6acafc6c02eb42b0ca1e97