FnO Navigator — D365FO Process Navigator

• Live App
• Source on GitHub

Problem

D365FO is a deep, interconnected ERP. When joining a project or debugging an unfamiliar module, it’s hard to answer basic questions: what tables are involved in this process? how does a purchase order flow through the system? where does this customisation plug in? The official documentation is sprawling and the AOT doesn’t give you a high-level map.

I wanted a fast reference that answers these questions without opening Visual Studio or digging through wikis.

Role

Solo author. Problem definition, data modelling, UI design, and implementation.

Solution

The app has three sections:

• Process Flows — grouped by D365FO module (AP, AR, Inventory, etc.). Each flow maps the stages of a business process and links to the tables touched at each step.
• Table Reference — searchable list of key D365FO tables with descriptions, fields, and relationships.
• Table Path Finder — given two tables, find how they relate to each other through the data model. The table relationship dataset and the concept for this feature were inspired by Alex D. Meyer’s work, who published a table relation dataset in one of his GitHub repositories that proved invaluable here.

Stack

• Framework: SvelteKit (static adapter — zero server cost, deployable anywhere)
• Build tool: Vite
• Data: Static TypeScript data files — curated from hands-on D365FO work
• Table relations dataset: static/data/fk-map.json (~2 MB JSON mapping parent tables to FK children with field-level join details, sourced from Microsoft’s ax-2012-doc-tools HTML ERD files and Alex Meyer’s MicrosoftDynamicsTableAssociations project)
• Deployment: Self-hosted behind nginx with Let’s Encrypt cert

Key decisions

• Static site — no backend to maintain, instant loads, deployable anywhere
• SvelteKit chosen for minimal boilerplate and fast interactivity without a heavy runtime
• Data as code (TypeScript) — type-safe, easy to extend, no database needed
• The FK graph covers 39,380 associations across 5,633 tables — the full Microsoft Dynamics schema graph

Status

Live and in active use. Source is publicly available on GitHub.