d740b30b_Known_Issues___Computer_Help__Issues
[Workaround] Outlook 2007 - Go to Tool then under Send/Receive select Global Address List. Click on "Update Global Address List." Outlook 2010 - Click on the Zimbra tab and under syncing, click on Sync Global Address List and then click on Update Global Address List. [Issues] 
Global Address List (GAL) is not up to date in Outlook.
Known Issues | Computer Help
Issues