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Here are the steps for setting up a POC for ADFS:
First of all, you need to decide on what your federation server farm will be called on the Internet.
In the drawing below I've chosen the name fs.contoso.com - this will be registered in DNS as follows:
Secondly, you need to make some design decisions:
To work on with your federation partner (SP or Service Provider):
*Host files are typically used on the ADFS proxy servers to point them to the internal IP of the DNS name of the federation server farm.
AD FS 2.0: Guidance for Selecting and Utilizing a Federation Service Namehttp://social.technet.microsoft.com/wiki/contents/articles/4177.ad-fs-2-0-guidance-for-selecting-and-utilizing-a-federation-service-name.aspx
Interoperability with Non-Microsoft Productshttp://social.technet.microsoft.com/wiki/contents/articles/2735.ad-fs-2-0-content-map.aspx#Interoperability_with_Non-Microsoft_Products
great article. we are about to set up a POC so this was helpfull