I take it you mean a conversion from AppMon to Dynatrace. Dynatrace ONE is a service offering, read all about it here.
Hope it helps you out,
Check also this doc page: How do I incorporate AppMon monitoring data into Dynatrace?
There was also a webinar on moving from AppMon to Dynatrace, hosted by Andi Grabner: https://www.youtube.com/watch?v=1mEtqxrGdBo
I strongly recommend to watch it 🙂