Duplicate forwarded email to external address

[pwinstanley]

've seen this problem mentioned on a few postings before but no fix.

Basically when I add a contact in AD to have an external address and
apply a forward to to a mailbox account the message is delivered twice
to the external address.

I have looked at the message tracking to find that the backend will
process the mail and pass it onto a front end virtual server which then
does the same thing.

Hope can I stop this happening?

Cheers
Win