My Exchange 5.5. server has many distribution groups that are not seen on a
client who has a mailbox on my E2k server. I see the global address list
with all recipients, however I think it's listing those recipients from the
Active Directory, and not the Exchange 5.5 directory.
So now, I create a distribution group (in Active Directory) and email-enable
it. Now I see, under "All Groups" my distribution list.
A secondary problem to that is that the ADC replicated the group to 5.5, and
there already was a group by the same name. Thankfully it appears that
Exchange uses a different generated unique ID for each group. BUT, in this
case replication seemed to work.
SO NOW, given my ADC has two-way replication and the "Distribution lists"
option on the ADC's "From Exchange" tab is checked. No groups from 5.5.