There is the possibility of having a Dynamics application put on a network. One choice of installation is to have it integrated into Active Directory so that anyone who is an authenticated user of will not have to login to the Dynamics app - their AD credentials will be good enough. In the past we have had a situation with an app of this nature and there was a big hassle when we moved the network to a newer AD e.g. Windows 2000 to Windows 2008 - Dynamics would not recognize the users on the new AD even though the names/passwords would be the same.
I am concerned about any other such issues with AD integration of this Dynamics app. In particular, I am concerned about reverse effects - i.e. a problem at the Dynamics end that will somehow spill back and cause problems in AD. Also any other gotchas - performance issues, security issues, etc.
Any real world input is appreciated on what can go wrong in this type of scenario is appreciated.