I have developed an Outlook Add-in to allow the user to save messages as .msg files to disk. This works fine.
However I would like to mark the message in some way to say that the message has been saved to disk. This is to prevent the user from saving the message again.
I have tried assigning a category, but the trouble is that any replies to the email are also categorised with the same category, even though the reply has not been saved.
Can anyone suggest a way that might do this.
Many thanks