Gathering some links:
This is for Server 2012 R2.
Securing a Web API with Windows Server 2012 R2 ADFS and Katana
Specifically the section around configuring ADFS with "Add-ADFSClient" and the RP configuration.
OAuth 2 Authorization Code grant in ADFS
And my contribution:
ADFS : ADFS 3.0 and OAuth2