Specify Global Domain Identifier

The remote global domain identifier is used to prevent message transfer loops. Trace information is maintained for routed messages. Each message transfer agent (MTA) the message enters indicates whether the message was relayed or rerouted, or caused a Distribution List (DL) expansion by that MTA. If the message enters the same MTA twice without a reroute, redirection, or DL expansion occurring, the message is detected as a loop and marked as non-deliverable.

A remote X.400 MTA is defined by the c, a, and p components of its address space. These components are collectively termed the remote X.400 MTA's global domain identifier and are used for tracing and loop detection on messages routed from the remote X.400 MTA. (Exchange adds additional trace information to messages beyond the standard X.400 c, a, and p components to ensure that if a message passes through two MTAs with the same c, a, and p, it is not detected erroneously as a loop.)

In Exchange, the remote global domain identifier is used in relay scenarios and affects outbound messages only.

To specify a global domain identifier:

1. Start System Manager
   on the Start menu, point to Programs, point to Microsoft Exchange, and then click System Manager.
2. Navigate to Connectors.

   System Manager

   1. Administrative Groups
   2. Administrative Group
   3. Routing Groups
   4. Routing Group
   5. Connectors
3. Right-click a connector, and then click Properties.
4. Click the Advanced tab, and then click Global Domain Identifier.
5. On Global Domain Identifier, select Specified GDI. By default, Use default GDI is selected.
6. Type a name for the PRMD (p), the private management domain.
7. Under ADMD (a), select Any or Specific. Any allows the X.400 connector to use any available administrative management domain (ADMD). If you select Specific, type a name for the ADMD.
8. Under Country/Region (c), select a value from the drop-down list.