The Exchange Server 2010 Edge Transport server role uses an instance of Active Directory Lightweight Directory Services (AD LDS) to store information about recipients and server configurations.
In some situations you may wish to connect to the AD LDS instance with ADSEdit.msc to view or make changes to data.
First you need to determine the port that the Exchange instance of AD LDS is running on. On the Edge Transport server open a command prompt and use the dbdsutil command to list the AD LDS instances.
dsdbutil: list instances
Instance Name: MSExchange
Long Name: MSExchange
LDAP Port: 50389
SSL Port: 50636
Install folder: C:Windows
Database file: C:Program FilesMicrosoftExchange ServerV14TransportRolesDataAdamadamntds.dit
Log folder: C:Program FilesMicrosoftExchange ServerV14TransportRolesDataAdam
Service state: Running
Next, launch ADSIEdit.msc, and open a new connection.
Set the naming context to Configuration and type in the server name (or localhost) followed by the port your AD LDS instance is running on.
Click OK to connect and you are now connected to the AD LDS instance being used by the Edge Transport server, and can view or modify the AD LDS data as necessary.