The links below include responses to frequently asked questions as well as useful instructions.
Moving to NM2 from Webmail/Netmail on Outlook Express
Moving to NM2 from Webmail/Netmail on Outlook 2003/2007
Moving to NM2 from Webmail/Netmail on Outlook 2010
Implementing Secured SSL on NM2 for Outlook Express
Implementing Secured SSL on NM2 for Outlook 2003/2007
Implementing Secured SSL on NM2 for Outlook 2010
NM2 Quick Implementation Guide
How to Setup a iPhone/iTouch on NM2
How to Setup a Vacation / Auto-Reply / Out of Office Rule in NM2
How to Forward Email in NM2