I noticed some of my users were struggling to log in occasionally and receiving the error message
Login Error:
Login failed as a suitable authentication provider could not be located. Please contact your administrator for further assistance.
After some poking around I found that the email domains defined in authentication providers are case sensitive:
But that they mention you can use regular expressions instead, so I worked out you can use the following regular expression to make it case insensitive instead:
(?i)@gmail\.com
