What OS are your DCs? And what is your DFL/FFL? If you go to Server 2003 or above across the board, you can drop your replication MUCH less than that with no negative impact (and I'm talking about 15 seconds in-site and 5 minutes out-site).
Regards, Michael B. Smith Consultant and Exchange MVP http://TheEssentialExchange.com -----Original Message----- From: Robb Pickinpaugh [mailto:robb.pickinpa...@anesthesiallc.com] Sent: Thursday, March 11, 2010 1:29 PM To: MS-Exchange Admin Issues Subject: RE: Exchange 2003 - parent domain - child domain - Offline Address Book errors - need some advice Michael, Thanks for your help, between everything I've read trying to solve this, and the help you've given I think I have this solved. 1. Our domain replication was set to 180 minutes. As a trial this morning I cranked that down to 45 minutes. GAL objects from the child domain are showing up at about that schedule now, so the delay was the site replication schedule. If the bandwidth usage gets too bad I'll crank it (replication) up a bit. 2. I tried disconnecting the parent domain user from the mailbox, and then connecting the mailbox to the child domain user. ESM hung until the next replication (at least it seemed to be that long), but then once I tested with that user, no OAB download errors. So, final solution = remove the mailboxes from the parent domain users, and attach to child domain users. It's going to take some time and looks like a weekend project, but at least I can go on with things now. Again, Thanks a TON for your insight Michael, learned a bunch about the diagnostic logging.
