Does any body know why Outlook might start suddenly setting the ImapDeleted MAPI property on forwarded emails?
I'm running Exchange 2010 SP1 RU4.
This issue does not occur in OWA. It does occur in Outlook 2010 & Outlook 2003, in online and cached mode. It follows the mailbox to new computers, and does not appear to be a plugin / addin issue as it still occurs when Outlook is started in safe mode. There are no rules configured for sent mail. Doesn't appear to be caused by the transport mechanism either, because I tried using pipeline tracing, and the property is set in the Original.EML file.