I just implemented an ADFS server to connect a third-party chat tool with our Active Directory via SAML 2.0.
Everything works fine so far but there's a little problem: As soon as a user logs in, the chat tool creates an account for him automatically. That's a problem because every account causes fees.
Is there any way to restrict the ADFS usage to an AD Group?
This can be done by adding a so-called Issuance Authorization Rule.
Step-by-step: