We've recently introducted a new Windows 2003 server into our organisation
and connected onto our existing Exchange 5.5 bridgehead server using X.400.
The servers communicate OK. The Windows 2003 server has a different domain
name to the Exchange 5.5 site. I've included both domain names in inbound
in the IMS. We can send messages from the bridgehead and they address
correctly, but when we send from the Exchange 2003 server the message is
sent to the bridgehead and dispatched to the WEB but the recieving address
is incorrect, looks like:

IMCEAEX-_O=xxx_OU=xxx_CN=server_CN=xxx@xxx.co.uk

The internet address is converted to the address of the bridgehead server
and not the orginating user which should be yyy@yyyy.co.uk.

Has anybody seen this before and got any ideas, we need to go through the
bridgehead server for another connector on the server.

Many thanks

Ian