|Interesting...I tried it myself and the drag-and-drop does work.|
I then tried to record a macro in Outlook like one might do in Word or Excel and found that the feature is not available in Outlook.
There are 2 things I can suggest, neither one of which is going to be of very much help. ;-(
1 - I can try and talk you out of it. Read this:
2 - Since there does not appear to be a built-in rule to do what you want, you can create a rule that runs a script when your conditions are met. As you create that rule, it will ask you for the location of the script.
Now, if we could only find a script to do what you want, we'd be all set!
All of my best tries at Google searches have turned up nothing different than what you have found, which is to move the attachments to folders external to Outlook.
Sorry, I'm at a loss here. Maybe someone else will come up with something.
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