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MB-920 Practice Question: Describe the core capabilities of the finance and operations apps

A company uses Dynamics 365 Finance and Operations and wants to extend the system to handle a unique business process that is not supported out of the box. What is the recommended approach?

⚠ Common exam trap

A common mix-up: candidates confuse the extensibility framework with direct source code modification, mistakenly thinking that any customization requires changing the base code, whereas Microsoft explicitly supports only extension-based customizations for upgrade compatibility.

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

Create a custom module using the extensibility framework

Dynamics 365 Finance and Operations provides an official extensibility framework that allows developers to create custom modules and extend the system without modifying the source code. This approach ensures that customizations remain upgrade-safe and supported by Microsoft, unlike direct source code modifications which break the application lifecycle.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • Purchase a third-party ISV solution

    Why it's wrong here

    ISV solutions may not cover the unique process.

  • Use Power Apps and Power Automate

    Why it's wrong here

    Power Apps and Power Automate are low-code tools for building custom applications and workflows, but they operate outside the Dynamics 365 Finance and Operations environment and cannot directly extend its core data entities, business logic, or table structures. The stem requires extending the system itself, which demands deep integration with the platform’s metadata and code—achieved through extensions in X++ or the Lifecycle Services (LCS) development model. This option is tempting because Power Apps and Power Automate are the correct choice for building standalone companion apps or automating external processes that connect to Dynamics 365 via connectors, such as a custom approval flow triggered by a vendor invoice.

  • Modify the source code of Finance and Operations

    Why it's wrong here

    Modifying source code is not supported and causes upgrade issues.

  • Create a custom module using the extensibility framework

    Why this is correct

    Custom modules built on the framework are supportable.

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Written by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

This MB-920 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the MB-920 exam.