So, in an effort to short-cut the many Technet articles and MSExchange.org posts i'd have to trawl through, I thought i'd post this query here for your edification
For several years i've run a MS Exchange 2003 front/back-end hosted pair of servers.
Recently I built Exchange 2007 servers next to them and migrated all the user mailboxes across, and pointed the HTTPS ports for the router at the new front-end server.
The old servers are still live, albeit with no mailboxes, but now the Outlook clients are getting the errors on send/receive indicating they can't download the OAB.
I've tried:
- Migrating the public folders across servers
- Configuring the new server to generate the OAB
- Rebuilt the OAB
- Configuring the OAB URLs to point correctly at the external address
....all to no avail.
Any ideas?