When you synchronize your mobile device with Microsoft Exchange Server 2003, you receive the following error message:
Error code: HTTP_500
Synchronization failed due to an error on the server. Try again.
Exchange ActiveSync typically locates the mailbox by using the left-hand side (LHS) of the primary Simple Mail Transfer Protocol (SMTP) address. The problem that is described in the Symptoms section occurs if the following conditions are true:
The user has multiple SMTP addresses.
The primary SMTP address does not match the default Recipient Policy.
To resolve this issue, install Microsoft Exchange Server 2003 Service Pack 2 (SP2). If applying Exchange Server 2003 SP2 is not an option, add a registry key to force Exchange ActiveSync to locate the mailbox by using the secondary SMTP addresses. To do this, follow these steps.
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:
322756 How to back up and restore the registry in Windows
Note This change requires that you restart the Microsoft Internet Information Services (IIS) Admin service.
Click Start, click Run, type regedit in the Open box, and then click OK.