When you synchronize your mobile device with Microsoft
Exchange Server 2003, you receive the following error message:
Synchronization failed due to an error on the server. Try
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
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:
How to back up and restore the registry in Windows
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
- Locate the following registry key:
- Right-click Parameters, click
New, and then click String Value.
- "New value #1" is selected. Type
SMTPProxy and then press ENTER to rename the value.
Right-click SMTPProxy, and then click
- In the String Data line, type the SMTP
domain of your default Recipient Policy. For example, type
- Click OK to quit Registry Editor.
- Restart the IIS Admin service. To do this, follow these
- Click Start, click
Run, type services.msc, and then click
- In the list of services, right-click IIS Admin
service, and then click Restart.
After you apply the new registry setting, Exchange ActiveSync
will look through all the SMTP addresses to locate the mailbox. For example, a
user at Contoso, Ltd. has the following SMTP configuration:
SMTP:email@example.com <------------Primary SMTP address
After you add the SMTPProxy value and set it to contosoltd.com,
Exchange ActiveSync will correctly look for the firstname.lastname@example.org mailbox. Important