I am not sure if this si the right list to pose this question, but here goes
My division recently setup a new win2k3 AD domain and joined it to the
company's win2k3 AD tree. The company runs Exchange and LCS from the root.
Another division in the same building as the root is hosted showed us
that their users can use LCS on their desktops, but we can't. The
guys managing LCS say that our domain users have permission to and are
configured for LCS just like the other domain, but its obvious that
the same pc on the same network segment will work with one of their
domain user accounts but not with one of ours. Does anyone have any ideas why it wouldn't work?