Upgrading code from AX 2012 to D365 can be a daunting task. MS has given us some tools to help but we'll go through a high level overview of the available tools and methodologies to get the process started.

Having trouble deploying a 7.3 environment on prem?

Create a cluster with 4 nodes for Dynamics 365 for Finance and Operations

Dynamics 365 For Finance and Operations has pretty decent documentation available on how to configure and setup an environment. However, some areas need some additional detail to really help them be ready for prime time. Specifically in the area of describing your proposed environment, things are sort of high level. The official documentation can be found here.

Learn how to run a database sync via command line for an Azure based instance of Dynamics 365 for Finance and Operations as well as how to perform the same action in an on premise environment.

The initial document and ConfigTemplate.xml from Microsoft and LCS is actually pretty good. The instructions are somewhat high level in some areas leaving a few details out and also there is very little assistance when it comes to the configTemplate.xml file. Below are some additions I made to the standard file from LCS which I hope will help others. It is also available for download if you prefer.

After running through a few installs, I have come up with a simple list of suggestions to help streamline the process and eliminate a little of the headache. For reference, these are the official steps to follow from MS for PU12 can be found here.

Install Azure Powershell Extentions On Template (also, use a template)