I ran into a couple good utils for inserting disclaimers and signatures into Exchange today. Exclaimer is very easy to config, has a nice GUI, rules engine, centrally managed, moderately priced. Adolsign is dirt cheap, and works via a command-line interface to be used with logon scripts, gpo’s etc.
Exclaimer:
http://www.exclaimer.co.uk/mailutilities.aspx
Adolsign:
http://www.itefix.no/phpws/index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=50
teknotes.wordpress.com 