Outlook 2007 sends local mail and non-spam to junk folder

Question

I have exchange server 2003 on SBS with OWA and several outlook 2007 clients.  Email often seems to be sent to the junk mail folder by outlook 2007, especially when it comes from the exchange server (either local pickup or MAPI). This is definitely being done by the outlook client, since it never happens when the client is not running (for example, if outlook is not running and I use OWA, local email is never delivered to the junk mail folder). 
I turned off junk email filtering in outlook, and forced the local domain to the whitelist (outlook refuses to add it with the gui, saying it's my local domian, so I imported it from a file), and it still happens before and after.
Any ideas?

Answer 1

If it's a local machine, try setting the account to not use cached mode. That should force utilization of Exchange's rules.
1.       Go to Tools >Account Settings
2.       Highlight your Exchange Account and click “Change”
3.       Uncheck “Use cached Exchange Mode”
4.       Click Next and finish
Note, this will not work well on a laptop that leaves the building, as it requires a connection with the server to view mail content.