Jeg fandt noget her på denne side
http://www.depts.ttu.edu/helpcentral/directions/update_gal.php som du måske kan bruge, nedenfor et uddrag af nederste del af siden.
Update AutoComplete Entries
When typing an address into the To:, Cc:, or Bcc: lines of a new message in Outlook 2003, Outlook will use AutoComplete and automatically suggest an address based on addresses it has cached. Outlook stores the cached e-mail information locally but does not keep it updated when new changes are made. In order to reflect any new changes made to the Global Address List, you must delete or disable the AutoComplete entry so that the information will be retrieved from the GAL instead of from the local cache.
To remove one address from the AutoComplete list:
Open a new message and begin typing in the address or person's name. Use the up and down arrow keys to select the address to be removed from the addresses suggested. When the address to be removed is highlighted, hit the Delete key on the keyboard. The next time you type the address, Outlook will check the GAL and update the local names cache with the new information.
To turn off AutoComplete so that addresses are never suggested:
Go to the Tools pull-down menu, choose Options.
Click the E-Mail Options button, and the Advanced E-mail Options button.
Uncheck the box for "Suggest names while completing the To, Cc and Bcc fields".