I?ve been working though the last week with our transition from exchange 2003 to 2010.
I hope to write up more of my findings soon, but I wanted to share this one as its happening.
I haven?t been able to get the offline addressbook to download for the users that have been moved.
Outlook 2010 uses IIS not public folders to download the OAB.
I found when I ran the powershell command
Update-GlobalAddressList -Identity "default global address list"
it throws a bunch of yellow warnings, mostly for public folders.
this leads me to think I have some public folder replication issues.
I?ll update more as I dig into this.