Your company recently deployed Exchange Server 2007. Client computers have either Microsoft Office Outlook 2003 or Microsoft Office Outlook 2007 installed. Outlook 2003 users report that they are unable to access the offline address book (OAB). Outlook 2007 users are able to access the OAB. You need to ensure that all users are able to access the OAB. On the Offline Address Book properties, which check box should you select?

A.
Enable public folder distribution

B.
Enable Web-based distribution

C.
Use Custom Schedule

D.
Include the Default Global Address List