ound by searching through a forum so can't claim I thought of it
//Follow this syntax: EXEC master.dbo.sp_addlinkedserver @server = N'ADSI', @srvproduct=N'Active Directory Services', @provider=N'ADsDSOObject', @datasrc=N'Servername.domain.com' --AKA the full computer name of the AD server //Then execute the openquery like this: select * from openquery ( ADSI,'SELECT name FROM ''LDAP://Servername.domain.com'' WHERE objectCategory = ''Person'' AND objectClass = ''user'' ')