I have been running Exchange 2007 since Feb 07 and just upgraded all of our servers to Exchange SP1. Love the new features and the extra GUI management.
My problem is that we set address lists via the msexchquerybaseDN attribute on every managed user in our AD. We have been doing this since March 2007. Since the upgrade to SP1, any user who has the attribute set cannot recieve autodiscover settings. When I remove the attribute and do an Outlook 2007 Autoconfiguration test, it works fine. So essentially, we have no free/busy, oof or autodiscover for any managed user running Outlook 2007. If I run a test-outlookwebservices on a cas server, everything comes back as a success regardless of the msexchangequerybaseDN attibute being set or not.
Have you heard of this before? Is there a planned hotfix for this issue and if so, when is the expected release? If you are interested in error messages in Outlook, please let me know.