To be honest I can't remember how 1.2 did it. I think there was an add-on put on the Exchange server but it was a while ago.
I haven't seen a trial version of 1.2 for a long time. There is certainly none on MS downloads.
I'm guessing the prereq documents are out there somewhere. If it helps, the old name for 1.2 was "Microsoft CRM", not "Dynamics CRM" (it was part of what was then called Business Solutions).
Leon Tribe
Want to hear me talk about all things CRM? Check out my blog
http://leontribe.blogspot.com/
or hear me tweet @leontribe
Want to hear me talk about all things CRM? Check out my blog
http://leontribe.blogspot.com/ or hear me tweet @leontribe