I've had this happen to me ever since 2010 R2. None of my jobs are listed as WORM media, and it happens with D2D and D2T jobs (on my VTL and LTO autoloader, respectively). This looks a lot like a bug to me. It's very intermittent.
We're experiencing this issue as well: case # 413-555-358
EV 9.01 for Exchange 2007 SP2
Basically, Outlook takes forever to load after an archiving run if we have moved-items processing turned on. Once we turn it off, post-archiving downloads from ...
<rant>
I don't know what's happened as I never used to have these kind of issues prior to 2010, but my experience has been exactly the same as the OP. It's gotten to the point where I don't even bother with Tier 1 support because they're:
A) Usel...
