The title may seem confusing and it is intended. While going through the Exchange 2010 Technet, I came across a statement which will confuse any Exchange admin. The article says that it has been updated for Exchange 2010 SP1, but the last updated date is 2009-12-10. It says,
****To benefit most from Web-based distribution, client computers must be running Outlook 2010 or Outlook 2007. Organizations that also have client computers running Outlook 2003 or earlier can use both public folder distribution and Web-based distribution. The Outlook 2003 Service Pack 1 (SP1) and earlier clients will still access their OABs by using public folders, while Outlook 2010 or Outlook 2007 clients will take advantage of the new Web-based distribution method****
The full article is here. It gives a feeling that Outlook 2003 SP1 and prior uses public folders for accessing offline address book, while 2003 SP2 can use both web-based and public folder OAB and 2007 & 2010 uses only web-based distribution. Seriously???
It is about time that the article is updated. I have seen a few questions in forums quoting the above statement. To be clear, Outlook 2007+ uses web-based distribution and 2003 & prior uses public folders for accessing OAB.