I have installed SCCM 2007 R2 on a domain member server. The SQL 2005 Server which hosts the database resides on a different domain member server. It appears that I have a stable configuration, in that I have no errors in the "System Status" area of the Configuration Manager Console, and the SCCM server has the proper permissions on the SQL database. However, after completing the Discovery process, I can only see the SCCM server itself and the SQL Server, none of the other servers or workstations is present. I have used both the "Active Directory System Group Discovery" method and the "Network Discrovery" method. As far as I can tell, I have the permissions set correctly both within the AD, as well as the SQL Server. I extended the AD schema prior to installation, but I notice that there is no value in the "Site Code" area, except for in the "All Unknown Computers" collection, which has two computers listed. Do I need to extend the AD schema again, or is there something else I missed?