Upgrade from AX 2012 to Latest Dynamics 365 Finance and Operation

Below are the steps defined by sequence.

1. Create new Upgrade project in Dynamics LCS.

2. Create VSTS Project and connect it with LCS Project.

3. Upload model store to generate generate Upgrade analysis report.

4. Upload model store to generate Code upgrade reports and get upgraded code.

5. Setup System Diagnostics to get an more idea about current environment and report to help in upgrade process. Link
This report will be accessible by link below, where last numbers are LCS Project Id

https://diag.lcs.dynamics.com/UpgradeAnalysisReport/Report/1350890 

6. Create Project Plan using inputs above.

Generally, This project consist of following phases.
Currently we have started with 1st activity Code upgrade, i will keep this post updated, as and when it is required.

A. Code upgrade.
   1. Decide where to deploy environment.

• If customer has purchased licenses, we can use their Build and Test environment to start code upgrade.
• Deploy in Partner LCS account using MS Azure subscription.
• Download local VM from LCS.

   2. Connect D365 FO VM to the VSTS Project to get upgraded code to work on further    and complete code upgrade.

B. Data upgrade

• Install hotfix to get Pre-upgrade checklist, review and complete checklist - Link

C. UAT

D. Pre-Go Live activities - Link

E. GO Live

F. Post Go Live Support.

Reference Links.
1. Microsoft documentation - all about upgrade from AX 2012 to Latest D365 FO. - Link


Things to review before estimate an upgrade efforts.
1. Latest CU must be installed in AX 2012 environment - Recommended by MS at Link. 
Click here to check latest available CU update for AX 2012 environments.