How to Call Power Automate Flow with ‘When a HTTP request is received’ Trigger Set to ‘Any user in my tenant’

When I set up a Power Automate HTTP request trigger with “Any user in my tenant” authentication, I wasn’t sure how to call this flow from other flows. Here’s what I discovered through my investigation.

Objective

I wanted to create a flow with the “When a HTTP request is received” trigger set to “Any user in my tenant”:

When trying to call this flow from another flow using the standard method:

It results in this error:

The goal is to enable this flow to be called from any other flow within my tenant.

Method 1: Using Entra ID’s “Send an HTTP request” Action

The first method involves using the “Send an HTTP request” action from Entra ID.

Select the action with “(pre-authorized)” from the Entra ID actions:

Create a connection as shown in the image:
Base Resource URL: The beginning part of the HTTP request trigger URL
Entra ID Resource URI: https://service.flow.microsoft.com/

Note: If you don’t see the “Create Connection” option, you might already have an Entra ID connection for other purposes. In this case, create a new connection from “Add new connection”:

Once the connection is successfully created, set the trigger URL in the [Request URL] field and run the flow:

The flow will execute successfully:

You can confirm the successful execution on the receiving end as well:

Method 2: Using HTTP Action

When using the HTTP action, you need to first register an application in Entra ID.

Prerequisite: Entra ID Application Registration

First, access Azure Entra ID:

Click on [App registrations] and then [New registration]:

Register the application with your preferred name:

Then go to [API permissions] → [Add a permission] and add [User] permissions:

Finally, add a [New client secret] from [Certificates & secrets]:

Take note of the client secret value:

And record both the client ID and tenant ID:

Calling from HTTP Action

Once the Entra ID registration is complete, configure the HTTP action with these values:
Note: The target audience is “https://service.flow.microsoft.com/”

The call will execute successfully: