>I have a COM server setup on an NT Server. Each user instantiates a new COM session on the server. How can I get all users to use the same instance?
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>I can get the same user logged in on different workstations to use the same instance but not different users.

Why do you want them to use the same instance? Even if it could be done (I don't know how it could), I don't think its a good idea- one application doesn't know what state the other application left it in.