ADAM (Active Directory Application Mode) is not supported by Microsoft on Vista and Windows Server 2008. If you are configuring Enterprise Server external Security Managers on the Vista platform, a remote Active Directory server should be used instead of ADAM. On Windows Server 2008, Microsoft has provided AD LDS (Active Directory Lightweight Directory Services) as a replacement for ADAM. External Security Managers which use AD LDS can be set up and used in a similar fashion to Security Managers that use ADAM.