Symptom

After selecting calendars or contacts to sync with Microsoft Outlook in iTunes and starting a sync, you may receive an error message that "OutlookSyncClient.exe has encountered an error and must close." The sync may not complete and contacts and calendars may not completely sync between the computer and iPhone or iPod touch.

Products affected

• iTunes 7.3.1 and later
• iPhone, version 1.0 and later
• iPod touch, version 1.1 and later

Solution

This may be due to the format of the Outlook Personal Storage File (.PST) used to store messages, contacts and calendar information by Microsoft Outlook. Verify that Microsoft Outlook 2003 is using a