After lots of legwork, I finally found what/where to buy the newest shipping
Trend AV software for SBS. I don't think it is specifically *for* SBS, but it
supports it. Here's what you want to buy, according to the Trend sales rep.
Make sure it is *not* simply the Client/Server/Messaging Suite. Get the one
that says, "for Small and Medium Business."
http://www.trendmicro.com/en/products/suites/csm-smb-suite/evaluate/overview.h
tm
Trend Micro Client/Server/Messaging Suite for Small and Medium Business.

CDW sells it, but you'll need to talk with a volume licensing specialist, not
just the first sales person you reach.
CDW part # 564861 TREND CLNT/SRV/MESSG STE SMB
Trend Micro part # CMSBWWE2XLDULNNAG
Price for 5-25 users:  $41.92/user account, not per computer
It is the preferred product for SBS. It requires only one install for the
suite rather than three separate installs for each component. Also, the price
has been lowered.

If you like printed docs, they cost $20.00 including the cd.
CDW part # 561401 TREND CLNT/SRV/MESSG STE SMB MEDIA
Trend Micro part # CMSBWWE2XSAZPNNZZ

Hope this helps someone. It took me many hours to get to the bottom of this. I
have no affiliation with any of the above mentioned businesses, just an end
user.

David F.