Auto/Manual Archive not working.
 

I have a user who has both auto-archive and does manual archiving.
Usually we tell users to drag and drop. But this user has a 400MB
Mailbox with many different subfolders. I understand the thing with
the modified date, and we have acknowledged that it isn't the case.
We have tried a second archive and it still does not seem to archive
anything. It hasn't been imported and were really running out of
ideas. There are two things that triggered in my head that I thought
maybe the problem. 1. Dell's have the new service agreement with
google, is google desktop play a part in archiving? I know he has the
search mailbox feature and uses it. As well as a Black Berry
enterprise server we have consently going out to our exchange server.
Could any of these be the problems?