I have one BM server we users have access to the HTTP Proxy with SSO using the CLNTRUST.EXE it is installed in TREE1

Now we will be hosting, on the network, a second tree (different company) and I would like the users from that tree (TREE2) to use the BM server / HTTP Proxy in TREE1. I know that when you request a site, that I can use the SSL logon (which works) but I would like to use CLNTRUST for the users of TREE2 as well.

Is this possible ???

I have read around a bit and have a feeling that I am not gonna win this one, but if there is any one out there with a good idea. Pls let me know.