When you run Outlook 2003 in Cached Exchange Mode, all the Outlook clients in the Exchange Server 2003 organization try to download the offline address book at the same time (909565)

SYMPTOMS

When you run Microsoft Office Outlook 2003 in Cached Exchange Mode, a period of very high network usage occurs. This high network usage occurs because all the Outlook clients in the Microsoft Exchange Server 2003 organization try to download the whole offline address book at the same time.

Additionally, when you click the arrow next to the Send/Receive Status icon in the Outlook status bar and then click Details, the status bar displays a message that is similar to the following:

Copying offline address book file name file

Additionally, several events that have event ID 27 may be logged in the Application log. These events occur if the following conditions are true:

You are running Microsoft Office Outlook 2003 Service Pack 1 (SP1).
You have the Offline Address Book logging feature enabled.

Note By default, the Offline Address Book logging feature is enabled in Outlook 2003.

These events are similar to the following:
Event Source : Outlook
Event ID : 27
Event Type : Error
Description : OAB ModDif failed. (Details record in event data).
Event Source : Outlook
Event ID : 27
Event Type : Information
Description : Starting OAB Download. Event Source : Outlook
Event ID : 27
Event Type : Information
Description : OAB Download Succeeded.

This problem occurs during the offline address book generation process. If an address that is entered in the offline address book contains an SMTP proxy address that is longer than 64 characters, the Outlook client does not apply the .diff file. The Outlook client then downloads the whole offline address book.

Note The 64-character limit includes everything to the left up to and including the at sign (@). The domain name is not included.

RESOLUTION

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Exchange Server 2003 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

You must install Microsoft Exchange Server 2003 Service Pack 1 (SP1) before you apply the hotfix.
For more information, click the following article number to view the article in the Microsoft Knowledge Base:

836993 How to obtain the latest service packs for Exchange Server 2003

Restart requirement

You do not have to restart the computer after you apply the hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.

File name	File version	File size	Date	Time	Platform
Oabgen.dll	6.5.7233.60	58,880	28-Nov-2005	18:51	x86

MORE INFORMATION

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates