Microsoft Exchange ActiveSync synchronization fails when there is a corrupted item in the mailbox. This occurs when the mailbox is on a server that is running Microsoft Exchange Server 2003 Service Pack 2 (SP2). If you turn on tracing in the NexTags tool, you may find an error message that resembles the following in the log files:

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Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

Because of file dependencies, this hotfix requires Exchange 2003 SP2. For more information about how to obtain the latest service packs for Exchange 2003, click the following article number to view the article in the Microsoft Knowledge Base:

Restart requirement

You do not have to restart the computer after you apply this hotfix. However, the following services will be restarted:

•	The Microsoft Exchange Information Store service
•	The Microsoft Search service
•	The IIS Admin service and all dependent services

Hotfix replacement information

This hotfix does not replace any other hotfix.

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
Exosal.dll	6.5.7651.49	70,144	15-Sep-2006	22:51	x86
Mdbmsg.dll	6.5.7651.49	3,375,104	15-Sep-2006	16:52	x86
Store.exe	6.5.7651.49	5,259,776	15-Sep-2006	22:52	x86

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

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For more information about mobile device verbose logging or NexTags server logging, click the following article number to view the article in the Microsoft Knowledge Base:

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