disable duplicate detection

Hi everybody,

I know duplicate message detection is a nice feature at all.

I have one requirement (some kind of archiving) in which this is really not wanted.

I've seen that it might be possible to disable this at all by setting the following key to 0:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\<Server
 Name>\<Private/Public-Guid>\Track Duplicates (in hours)

As I don't want to disable duplicate detection at all but only for only recipient mailbox I didn't go into that direction.

Does anybody knows if it is possible to disable this on per user / per mailbox basis?

Thanks a lot,

Matthias