On May the 8th Windows Server 2008 Active Directory from Microsoft received the certification for the SAP NetWeaver AS – Directory Interface for User Management via LDAP (BC-LDAP-USR) interface. The certification encompasses compatibility test with Application Server ABAP as well as compatibility/integration test with NetWeaver Portal User Management Engine.
Using the SAP’s directory interfaces lets you now also leverage user information stored in Microsoft Active Directory 2008.
You can see the list of solutions from Microsoft that are certified for SAP interfaces here.
In the whitepaper Integration of SAP Central User Administration into Microsoft Active Directory I have described how the ABAP usermanagement can be configured to synchronize information stored in Microsoft Active Directory.