Article ID: 823580 - View products that this article applies to.
This article describes how to configure how the Offline Address Book is downloaded when you use Microsoft Office Outlook 2003, Microsoft Office Outlook 2007, Microsoft Outlook 2010, or Microsoft Outlook 2013 in Cached Exchange Mode.
To configure how the Offline Address Book is downloaded when you use Outlook in Cached Exchange Mode, follow these steps to configure the DownloadOAB value in the Registry.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/322756/ )How to back up and restore the registry in Windows
When you set this registry value to 0 (zero), cached-mode Outlook is forced to perform directory lookups against an Active Directory directory service global catalog server. This action increases the timeliness of access to modified or new Active Directory objects. However, this action also negates some of the increased tolerance for network latencies and outages.
Important Note: If Offline Address Book (.oab) files were previously downloaded and associated with a MAPI profile for Microsoft Outlook, this setting will not have the correct effect. To use this setting, you must set the registry value, remove any .oab files from the local computer, and then synchronize.
The location of the .oab files on your computer vary according to your Outlook version and the version of Windows on which Outlook is installed. The default location for .oab files is provided below.
Outlook 2007 and Outlook 2003
(http://go.microsoft.com/fwlink/?LinkId=151500)for other considerations.
Article ID: 823580 - Last Review: August 22, 2012 - Revision: 12.0
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