We are in an coexistance porttion of a Exchange 2003 to Exchange 2007 migration. When we hook Outlook up to the Exchange 2007, the GAL comes up fine. However when we attempt to use the GAL in OWA 2007. It is empty (except for the Public Folder mailing lists that were created as a part of Public Folder replication). I checked the OAB on the CAS server and found that the Default OAB is listed as being the OAB from the Exchange 2003. Questions is do I just add a new default OAB and make it the default and delete the old one or what?