Is every AX customization upgraded?

No. Each customization should be evaluated against standard D365 capability, business value, technical health, control requirements, and future ownership.

When is reimplementation worth considering?

Reimplementation is worth evaluating when the AX footprint is heavily customized, the operating model is changing, or the organization wants a cleaner foundation and can support stronger process design.

What is the most important early artifact?

A transparent decision inventory that connects each customization, integration, and data domain to its target treatment, owner, risk, and evidence.

Dynamics AX to D365 F&O Migration Guide

Use this guide to decide what to upgrade, redesign, or retire when moving Dynamics AX to Dynamics 365 Finance & Operations.