How do you create an Alert to notify you when there is an IP Conflict?

It looks like there's a Microsoft event ID associated with that issue. You could have your events forwarded as traps to SolarWinds and then alert when you see this particular one come across.

http://technet.microsoft.com/en-us/library/cc957250.aspx

Thanks! that is a good approach.  I was hoping there was a predefined Alert like there is in What's UP Gold.

I find it better to trigger on the syslog alert that the switch throws when a duplicate IP is detected.  There's no guarantee that you'll always have MS hosts properly configured - the switch will always know.