OL98: Item Using VBScript Cannot Be Displayed In Preview Pane (231989)

MORE INFORMATION

If the item is a mail message or post, it cannot be previewed if the item is based on a custom form that uses Visual Basic Scripting Edition (VBScript) in any way.

If the item is something other than a mail message or post, it will display in the preview pane if it is based on a published form. However, it cannot be previewed if the item -- at any point in time -- contained VBScript that was directly stored within the item. Once an item contains programming code, Outlook sets a flag in the item indicating that it contains active content. Once this flag has been set, it cannot be reset. If you delete the VBScript, or programmatically change the message class so that the item will once again used a published form, the contents of the item will still not be viewable in the preview pane.

VBScript code can be stored in the item if the form designer specified saving the form definition with the item, or if the item somehow used a one-off form.

For more information about one-off forms, please see the following article in the Microsoft Knowledge Base:
For example, if you receive a mail message that is based on a custom form stored in the Organizational Forms Library, you will not be able to preview the mail message. If you use a custom contact form that is stored in the Organizational Forms Library as your default contact form, you will be able to preview the Notes field using the preview pane. If the custom contact form becomes embedded in the contact item, you will no longer be able to preview the contact.