External authentication providers in AD FS

Quick note that Jen Field, a Program Manager in the AD team has posted a great set of articles on authentication providers in AD FS in Windows Server 2012 R2 including MFA and how to build your own.

There are 3 great articles:

• Overview of MFA in AD FS in Windows Server 2012 R2
• Build your own adapter walkthrough: part 1
• Build your own adapter walkthrough: part 2

Enjoy, these are worth a read.

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