Looks like I'll wait for the 2.0.5 release and re-deploy/re-test. BTW - I populated the ZEG mailboxes first using imapsync from the client's existing mail server. Out of the 10+ users, I had trouble with 2 of them. Apparently, there are existing messages that Openchange is choking on. It may have to do with calendar appointment "invites". I'm still investigating, but I'll wait for 2.0.5 before continuing.
-- Scott -- users@sogo.nu https://inverse.ca/sogo/lists