Password prompting for re-connect of NetServer

Folks,

Spent the last hour digging through Microsoft's product support looking for
the parm to turn off password caching in regard to network drives.  No dice.
I am looking for the following to occur.

1.  User maps drive to \\as400server\root and is prompted for
username/password.
2.  User does what they need to do
3.  User is inactive for 5 minutes
4.  AS/400 disconnects session
5.  User double-clicks on drive in "My Computer" to re-open session
6.  User is prompted for username and password again

I can get steps 1-5 to work.  Step 6 is where the problem comes about.
Windows caches the username/password for the specific server and does not
require the user to re-authenticate.  Any ideas on how to get this to work
the way I want it to?  The only reason I'm doing this is b/c if a virus
slips by Exchange (which has been known to happen many, many, many times),
and it's one of those ones that deletes .gif or .jpg files, if the drive is
still mapped, you can kiss your websites goodbye.  Thanks in advance for
your help.

Justin C. Haase
Midrange Systems Engineer - Kingland Systems Corporation
IBM Certified AS/400 Systems Administrator
phone - 641.355.1035
e-mail - justin.haase@kingland.com
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