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Displays a dialog box that contains option properties for a particular address type and message.
The IMAPISession::MessageOptions method displays a dialog box that specifies properties for a particular message and address type. These properties are under the control of the transport provider that handles the address type. Users can change the properties, but these changes do not take effect until the client calls the message's IMAPIProp::SaveChanges method.
Users can change option properties that apply to the following:
A particular message and address type.
All messages for a particular address type.
Changes that were made to the option properties for a particular message and address type do not affect the option properties that apply to all messages.
For more information about how to work with message option properties, see Message and Recipient Options.