When Microsoft Outlook is configured in Cached Exchange mode and you open the Address Book, the global address list (GAL) is not displayed by default. Instead, another address list such as \All Users is displayed, and the GAL must be manually selected from the When opening the address book, show this address list first Address Book option. This is demonstrated in the following figure:
You may also receive an error message that resembles the following error in a synchronization log message when you try to download the Offline Address Book (OAB):
In the situation where you cannot download the OAB, you will find the following event in the application event log.
You may also receive an error message that resembles the following error in a synchronization log message when you try to download the Offline Address Book (OAB):
Microsoft Exchange offline address book
Not downloading Offline address book files. A server (URL) could not be located
0X80004005
Not downloading Offline address book files. A server (URL) could not be located
0X80004005
Source: Outlook
Event ID: 27
Description: The operation failed.
Event ID: 27
Description: The operation failed.