A follow-up document to the original HSPD-12 Logical Access Authentication and Active DIrectory Domains document has just been posted to the download center. The follow-up document demonstrates the increased flexibility of FIPS 201 PIV-II compliant smart cards with Windows Server® 2008 R2 Active Directory, Windows 7 and Office 2010. Included within this document are detailed steps to configure Windows Server 2008 R2 Active Directory Domain Services (AD DS), Active Directory Certificate Services (AD CS), Windows® 7, and Microsoft® Office 2010 to perform traditional UPN based smart card logon, explicit smart card logon (client authentication certificate mapped to multiple accounts), explicit cross-forest smart card logon and NIST SP800-78-3 compliant S/MIME email exchanges.

You can find both the original and follow-up document on the Microsoft download center HSPD-12 Logical Access Authentication and Active Directory Domains

http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=9427.