We are installing exchange 2010 which co-exists with exchange 2007. Currently, our ASA rules are setup to allow SMTP and HTTPS on our external IP say... 74.x.x.50. This is the rule for exchange 2010.
Secondarily, 74.x.x.50 is natted to 192.168.1.12 (exchange 2010).
Simple question, is it possible for us to add my NEW exchange 2010 server to the same NAT rule? IE 74.x.x.50 NAT translates to BOTH 192.168.1.12 AND 192.168.1.45 (exchange 2010).
If not - what is the preferred method? Keep in mind exchange 2007 and exchange 2010 co-exist so traffic should not be affected to my exchange 2010 server until I turn doen excahnge 2010.