If I add a new user account/email to our Active Directory, it can sometimes take a day for that new person to appear on everyone's built in Contact list under Outlook. Why is this? Is this an Outlook 2007 problem or an Active Directory/Exchange problem? The new user won't appear after a log off/log on either. I'll forget about this issue and then the user name will magically appear later without any intervention from me. How can I force new users to appear under the Global Address List composing an new email and hitting the "To..." button?