Logic Flows

Overview

A Logic Flow is a sequence of steps executed in a specific order. Each step is an action that performs computation, manipulates data, or interacts with external systems. If a Logic Block is a reusable function, a Logic Flow is a program—a complete workflow with loops, flow control, branching, and variable assignment.

The key distinction between Logic Blocks and Logic Flows:

Aspect	Logic Block	Logic Flow
State Change	Immutable (read-only)	Mutable (changes state)
Purpose	Calculate values, make decisions	Execute actions, orchestrate processes
Operations	Computation only	Create, update, delete records; call APIs
Analogy	A function	A program

While Logic Blocks calculate and return values without side effects, Logic Flows change the system's state. A Flow can create records, update fields, delete data, send emails, invoke external APIs, and orchestrate complex multi-step business processes.

Why Logic Flows?

Logic Flows empower citizen developers to describe complex business logic without writing code. The visual designer and rich library of built-in steps make it possible to:

• Automate business processes: Create workflows that respond to events and execute actions
• Integrate systems: Connect Dynamics 365 with external APIs and services
• Orchestrate data: Move, transform, and synchronize data across entities
• Implement business rules: Execute complex logic with conditions, loops, and branching
• Extend Dynamics 365: Add capabilities beyond out-of-the-box functionality

Flow Structure

A Logic Flow consists of:

Component	Description
Name	Unique identifier for the flow
Description	What the flow accomplishes
Inputs	Data passed into the flow when invoked
Outputs	Data returned by the flow upon completion
Variables	Internal data storage during execution
Steps	The sequence of actions to execute

Flow Execution

When a Logic Flow is invoked:

1. Inputs are received and made available to steps
2. Steps execute in sequence from top to bottom
3. Control flow steps (conditions, loops, switches) alter the execution path
4. Variables store intermediate results between steps
5. Outputs are set and returned to the caller

See It in Action

Click ▶ Run Flow to watch a Logic Flow execute step by step — observe how variables update, conditions branch, and each step transitions from pending to complete.

Create Contact from Web Form

○ Ready

01VariablesReceive Inputs

Bind inputs: name, email, phone

02Data OpsFind Contact

Query: contact where email = @email

03Flow ControlContact Exists?

Condition: contactId ≠ null

04Data OpsCreate Contact

Create Contact(name, email, phone)

05IntegrationSend Welcome Email

HTTP POST to notification service

06EventsPublish Event

Publish: ContactCreated { contactId }

07VariablesSet Output

Return: { contactId, status }

Execution Log

Press ▶ Run Flow to execute

Flow Steps

Logic Flows offer a rich library of built-in steps organized into 8 categories. Click any category to explore its full documentation.

⬡

Data OperationsCreate, read, update, delete Dynamics 365 records

→⟂

RelationshipsManage entity relationships and associations

→◇

Flow ControlConditions, loops, switches, and branching logic

→x

VariablesDeclare, read, and update variables during execution

→⇆

IntegrationHTTP calls, webhooks, and external service connectors

→↗

InvocationCall Logic Blocks, Flows, and Dynamics 365 actions

→◉

EventsPublish business events for downstream consumers

→⚠

Error HandlingTry/catch, retries, compensation, and fault branches

→

Logic Blocks vs. Logic Flows

Aspect	Logic Block	Logic Flow
Purpose	Calculate values, make decisions	Execute actions, orchestrate processes
State	Immutable (no side effects)	Mutable (changes data)
Operations	Read-only computation	Create, update, delete, integrate
Structure	Single calculation/decision	Sequence of steps with control flow
Reusability	Called from Flows and other Blocks	Called from Recipes, other Flows, APIs