Messages sent from Exchange 2007 to Non-Exchange Recipients through an Exchange 2003 Connector are NDRed by the first Hub/Transport Server

In a mixed Exchange 2007/2003 environment with a Connector to a Non-Exchange System on an Exchange 2003 Server you cannot send messages from Exchange 2007 to a recipient in the Non-Exchange System if the following two conditions are true: 1) the Connector contains an Address Space with an underscore (“_”) in it, like in the following example:…


What is an Extrace ?

So I wanted to Write a post, where I mentioned, that we used for troubleshooting extrace, but I scould not find any good public link for explaining , what is an Exchange Extrace. Actually I therefore reutilize an old Explanation for an OWA Extrace, which I sent several times to customers, but which was initially from…