Exchange gateway as well as Exchange is installed on a server in child domain.
Gateway cannot find the connector in Active Directory and is looking in Active Directory for the configuration container to be in the child domain.
The configuration container for Active directory does not reside in the child domain but instead resides in the parent domain always.
This setting can be found in: HKEY_LOCAL_MACHINE\SOFTWARE\novell\GroupWise
Modify the Key "Domain" and remove the DC for the child domain
Example "Domain" Key value:
Modify to read
1) Install two windows 2003 servers. Install the second server in a child domain rather then the parent.
2) Install exchange on the second server in the Child Domain
3) Install the gateway on the second server in the Child Domain
4) Try to start gateway and note the error in verbose logging on the gateway or gateway logs will contain the distinguished path. The distinguished path will show that the gateway is trying to locate the connector but is looking in a path similar to this. ADsPath - LDAP://cn=gateway name,cn=Connections,CN=First
Routing Groups,cn=First Administrative Group,cn=Administrative Groups,cn=First
In this distinguished path you can note the child domain is listed in the path to the configuration container. This is incorrect since the configuration container is in fact always present in the parent domain under Active Directory.