OAuth2 with Microsoft

Hello Community,

I'm starting to explore OAuth2 and, as a first step, I want to set up an OAuth2 authentication with Microsoft. I've created a small sample page that attempts to sign in with Microsoft. However, after entering the user credentials, the redirection doesn't work.

 
Die Einstellungen im Managment Portal sehen wie folgt aus:

System>Security Management>OAuth 2.0 Client>Create Server Description:
   
System>Security Management>OAuth 2.0 Client>Client Configurations
 

The redirect URI is also registered in Azure, and the web application "/csp/sys/oauth2" is activated.

What could be the reason that it's still not working?

Best regards,
Daniel Goerke