I'm currently trying to connect using GAM with a 3rd party authentication provider that is Auth0. It provides many different types of connecting with them, one of which is by using Oauth2.
I've followed this article in Genexus Wiki that has some examples. The configuration is very straight forward, using the information provided by Auth0 (client secret, client id, endpoints, etc) but after setting up all that, at the moment of trying to login it only shows up with the local login, instead of redirecting to Auth0 Login Page.
Has anybody configured and run succesfully with this Provider, or any other that isn't the Google/Office365 examples from the wiki?
I'm using Genexus 17 U5 with Java Generator
I had the same problem.
It was solved unchecking "Include Redirect URL" in Authorization tab.