MFA Authentication Provider for ADFS 2.0

Question

I don't seem to find information specifically for implementing an authentication-provider for ADFS 2.0 (and 2.1).

I already implemented an MFA authentication-provider for ADFS 3.0 using C# - that was a really smooth process, implementing some interfaces of Microsoft.IdentityServer.Web. But I don't see any docs for this on ADFS 2.x.

Any ideas or experience with this?

Thanks in advance!

Answer 1

MFA and all the extra claims (and claims engine instances) were new in ADFS on Windows Server 2012R2. It did not exist in earlier versions.