You cannot access a customized property for an appointment item in Outlook Web Access on Exchange Server 2003 after you save the appointment item two times

Consider the following scenario. You create a customized property for an appointment item in Microsoft Outlook. Then, you use Microsoft Outlook Web Access to save the appointment item two times. In this scenario, you cannot access the customized property for the appointment item in Outlook Web Access. However, you can access this property in Outlook.

This behavior occurs because some customized properties are deleted when an Outlook MAPI appointment item is converted to MIME. The MAPI content conversion process is not completed until the item is saved two times in Outlook Web Access. Outlook can find the customized properties for the appointment item because Outlook accesses these properties internally.

This behavior is by design.

The customized properties are not lost. If you are an administrator, you can still enumerate the customized data by using one of the following methods:

• Use the Collaboration Data Objects (CDO) fields collection to look in the PS_PUBLIC_STRINGS propset.
• Use extended MAPI to look in the PS_PUBLIC_STRINGS propset.