911delorean,
There isn't an Intercom Directory section in the MiVO-250 as it get the information directly from the Description section of all of the dialed devices [Phone, Phantom, Hot Desk, Hunt Group] in the system.
There was supposed to be an Exclude from IC Directory folder since 6.0, but I have never seen or used it and I don't think it really exists.
Thanks,
TE