We upgraded from 126.96.36.199 to 188.8.131.52 and now are getting a 404 error on the authz endpoint with our apps that use .net 4.6 and Microsoft.Owin.Security.OpenIdConnect. All of our other oauth clients work fine. The client makes a request like this and NAM returns the 404 error:
I have a case opened on the issue. It sounds like someone had a similar case open before, but I haven't heard back on it yet.
Has anyone run into this?