Automating Event Registration: Get CIJ Segment Contacts Using Power Automate

Introduction

 At PS Hummingbird, we thrive on solving real-world challenges with practical, scalable solutions. When it comes to fast-paced marketing, timing is everything.

The Challenge: We needed to generate event registrations by retrieving contact records from a Customer Insights – Journeys (CIJ) segment — without relying on manual form submissions.

The Solution: We built a Power Automate flow that calls an unbound Dataverse action - msdynmkt_MembersList - to retrieve segment contacts. For each contact, we automatically created an Event Registration record, enabling seamless and proactive enrolment.

📘 In this blog post, you’ll learn:

• How to call msdynmkt_MembersList to get segment members

• How to parse the contact IDs using Power Automate

• How to create Event Registration records in Dataverse

• A visual walkthrough so you can replicate it with ease

💥 Empower your event automation by integrating CIJ segmentation with Dataverse workflows.

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Why This Is Useful

• Automate event enrolment for key contacts

• Bypass the need for form submissions

• Save time and streamline internal processes

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Step 1 – Create a Power Automate Flow

Instead of using direct Dataverse queries, we leveraged an unbound action called msdynmkt_MembersList to get the contact list dynamically. Here's how:

1. Create an Instant cloud flow with a manual trigger

2. Add Perform an unbound action (Dataverse)

   • Action Name: msdynmkt_MembersList

   • SegmentId: Pass your target segment's GUID

   • You can extract the full output text from the unbound action using: outputs('Perform_an_unbound_action')?['body/ResultText']

3. Add a Parse JSON step

   • Use the output of msdynmkt_MembersList

   • Provide schema like:

{

  "type": "object",

  "properties": {

    "baseEntityLogicalName": {

      "type": "string"

    },

    "primaryKeyColumnName": {

      "type": "string"

    },

    "members": {

      "type": "array",

      "items": {

        "type": "string"

      }

    },

    "additionalProperties": {

      "type": "object",

      "properties": {}

    }

  }

}

                    

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Step 2 – Loop Through the Segment Members

To iterate through the list of contact IDs returned by the msdynmkt_MembersList action, use an Apply to Each loop.

• In the Apply to Each, set the array input as:

  body('Parse_JSON')?['members']

• This loops through each contact ID in the members array parsed from the segment.

• Inside the loop, use the current item (which is the contact ID) as a lookup for creating your event registration.

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Step 3 – Create Event Registration Records

1. Inside the loop, add Add a new row in the Event Registrations table:

   • Set Contact = current item

   • Set Event = target event

   • Set Registration ID = e.g. ER-utcNow()

   • Set Primary role = Attendee

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Final Thoughts

This is a powerful technique to programmatically associate contacts with events - especially in B2B, internal events, or pre-qualified audiences.

By combining CIJ Segments + Dataverse + Power Automate, you can create smart, no-touch registration workflows that run behind the scenes.

Let me know if you'd like the full flow export or a diagram of how we implemented this!