ADFS - Restrict to AD Group
This can be done by adding a so-called Issuance Authorization Rule.
Step-by-step:
- Open AD FS Management Center
- Expand Trust Relationsships
- Select Relying Party Trusts
- Right click the required trust
- Click Edit Claim Rules
- Goto the Issuance Authorization Rules tab
- Delete the default Permit Access To All Users rule
- Click Add Rule
- Select Permit or Deny Users Based on an Incoming Claim
- Incoming Claim Type, select Group SID
- Click Browse at Incoming claim value
- Select the required group
- You're done