Hi twyd2009,
Yes & No ;) the messages will get archived but the P2 messages will be archived incorrectly, and you will also loose OSIS if you using the same VSG as normal mailbox archiving.
The ArchivingAgent does not know how to handle a Envelope, the only way to process P1 & P2 correctly is using the Journal Task.
Question thou, why would you want to do this? Besides, this is not legal should you not have a journal license and want to journal using mailbox arching.
--wayne