I have an ASP.NET MVC 5 site that uses OWIN external logins from Microsoft, Facebook, and Google. Everything has been working fine for many months. About a month ago I upgraded to Microsoft.Owin V3.1.0 and logins by all three providers have been working. A couple of days ago, logins via Microsoft stopped working. Logins via Facebook and Google still work. My external callback is being called with "/Account/ExternalLoginCallback?RememberMe=False&error=access_denied" from Microsoft. Has something changed at Microsoft or am I doing something wrong?
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