I Appreaciate that Upgrade gnereally is a standard process however the 2018 version is different than the others prior.
What are the key points to cover a 2015 upgrade to 2018. Should I focus on try to move code to Extensions or more to event / Subscriber model ? Has someone a brief guide and experience ?
Follow the guide from Microsoft:https://docs.microsoft.com/en-us/dynamics-nav/upgrading-to-microsoft-dynamics-navBut you have to decide: There a two ways you can go1) Keep modifying the standard code as you probably have done in NAV 2015 (Using the Classic Development Environment) or
2) Recode everything as extensions using Visual Studio Code.DON'T try to do a mix of both, it is going to be a nightmare.