I have a client that I’m working with on a general consulting role(outside of NAV) and the question has come up if 2.3.x can run in windows rel 2008 or 2008r2? does anyone know if it can please
are you sure, you mean nav 2.3?
for the list of nav versions follow:
http://en.wikipedia.org/wiki/Microsoft_Dynamics_NAV
if you mean nav 2.5 follow this thread (answer is no):
http://dynamicsuser.net/forums/p/58068/311541.aspx
if your client wants to upgrade the windows platforms to win2008 (r2), then he should also upgrade to nav 2009 (r2).