Authorization has been denied for this request - Azure Active Directory - What logs are available?
<p>So I'm using postman with the OAuth 2.0 process to try to authenticate against my WebApi over Azure Active Directory. I am still on the default project with the basic ValuesController, just trying to get authentication and authorization to work.</p>

<p>I've followed <a href="https://blogs.msdn.microsoft.com/devkeydet/2016/03/22/using-postman-with-azure-ad/" rel="noreferrer">this video</a> to setup postman, and as far as I can tell, I've configured the new applications in active directory as described.</p>

<p>The token exchange is working. And the Authorization Bearer {token} is being sent correctly. Here is an example token:</p>

<p>{Bearer eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsIng1dCI6IlliUkFRUlljRV9tb3RXVkpLSHJ3TEJiZF85cyIsImtpZCI6IlliUkFRUlljRV9tb3RXVkpLSHJ3TEJiZF85cyJ9.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.NXpvslBXOpRNkmWQqj7XqVzloS3KoeSqPIlo-yUPGYkZ4bHPrAH6yD4sxMYz-19VIPFRDUMP-5h5hmaMKmuykjNUltz6wejQT9f4IeV6i7VtP3BlkfASZeAdKAiSjKh6ydV8PuJjV2HHh2WvxIKC3QQXzROwWAdeXLcgMTiKSBMULzFV8BsecgtI86_L2OISgbQZ2LgF137EPJoG7C4L1IO-10T1QIVl-Emy6AS0VKVxdzjCgiT-DFtccxME6n1CruoDy6mTKztcAkiFR1IlgY6Fvj-Y_goMQyxA5sCRebWnOQ5jeUKv4KNyNWOLJU_RiZYe0kj4IT3KDc9jjtHykg}</p>

<p>However, even though I get the token successfully and when I step through the debugger in VS, I see the token coming in, Authorization is failing. I get the following response:</p>

<pre><code>{"Message":"Authorization has been denied for this request."}
</code></pre>

<p>The issue seems to be on the server side. When I override IsAuthorized to return true, it works.</p>

<p>In Azure, both applications are in the same directory with delegate permissions on.</p>

<p>Are there any logs I can check to see the exact denial reason? From there I can probably figure out what is going on.</p>

<p>I've turned on tracing, with: </p>

<pre><code>// Web API configuration and services
var traceWriter = config.EnableSystemDiagnosticsTracing();
traceWriter.IsVerbose = true;
traceWriter.MinimumLevel = TraceLevel.Debug;
</code></pre>

<p>But it's not really telling me why I get the denial.</p>