Long term EntryID for Outlook Messages

[bradyboyy88]

I am wondering if there is a unique ID similar to EntryID which remains unchanged with an email item regardless of if its moved to another folder. Does this exist?

 

[bradyboyy88]

So I could not find a outlook solution for this but for anyone looking here is the correct schema to get the message-id which is a property to a email and is unique. It should stay constant regardless of if you move the email. THe next part is trying to figure out a vba method to search outlook mailboxes by this id:

msg.PropertyAccessor.GetProperty("http://schemas.microsoft.com/mapi/proptag/0x007D001F")