Power Automate: Easily Identify Approved Group Senders with Graph API

Key insights

• Power Automate and Microsoft Graph API work together to help you identify approved senders in Microsoft 365 groups, distribution lists, and mail-enabled security groups. This integration allows organizations to automate the management of who can send emails to specific groups, increasing control and reducing unauthorized communication.


• You can use Graph Explorer to test different Graph API endpoints before adding them to your Power Automate flows. This helps verify which endpoints return the data you need for both M365 and non-M365 group types.


• The process uses a combination of documented and hidden (undocumented) Graph API endpoints. These allow you to retrieve approved senders from all group types—even nested or complex group structures—by making authenticated HTTP requests inside Power Automate.


• A key difference exists between M365 groups and mail-enabled groups: M365 groups have direct support in the standard Graph API, while non-M365 (like distribution lists) may require special or less-documented endpoints for accessing settings or sender permissions.


• Delegated access, along with the "HTTP with Microsoft Entra ID" connector in Power Automate, helps bypass some limitations of standard connectors by allowing more flexible authentication. This is especially useful when dealing with group types not fully supported by default APIs.


• The workflow includes steps like finding group details, retrieving approved senders (including from nested groups), filtering for active users, and formatting results. These actions enable admins to automate notifications or reports about who is authorized to send messages within their organization’s email groups.

Introduction: Automating Group Management with Microsoft 365 and Power Automate and Graph API

Microsoft 365 administrators are constantly looking for ways to streamline group management and ensure secure communication. In a recent YouTube video by Isabel Liu, viewers are guided through a method for identifying approved senders in Microsoft 365 groups, distribution lists, and mail-enabled security groups using a combination of Power Automate and the Microsoft Graph API. This approach not only automates what is often a time-consuming task, but also tackles some of the hidden complexities and undocumented endpoints in Microsoft’s ecosystem.

By leveraging these tools, organizations can automate access controls, audit group permissions, and maintain compliance more effectively. The tutorial stands out by revealing lesser-known Graph API endpoints and demonstrating how to retrieve approved senders even from nested groups, which can be particularly challenging with conventional methods.

Understanding the Technologies Involved

At the heart of this solution are two powerful Microsoft technologies: Power Automate and the Microsoft Graph API. Power Automate enables users to create automated workflows—called flows—that can be triggered by events or run on a schedule. These flows can make HTTP calls to external APIs, including the Microsoft Graph API, which provides a unified interface for accessing a wide range of Microsoft 365 data.

The Graph API serves as the gateway to information about users, groups, and their settings. In this context, it allows administrators to fetch data about group membership and, crucially, identify who is allowed to send emails to specific groups. This kind of automation is especially valuable for large organizations where group memberships and permissions change frequently.

Step-by-Step Workflow: From Endpoints to Insights

Isabel Liu’s tutorial outlines a clear workflow for retrieving approved senders. First, the process begins by using the Graph Explorer tool to test various API endpoints, including some that are not officially documented by Microsoft. These endpoints are critical for accessing data on both Microsoft 365 groups and non-M365 groups, such as distribution lists and mail-enabled security groups.

The next step involves translating these tested endpoints into actions within Power Automate. The video demonstrates how to configure HTTP actions in Power Automate, authenticate using Entra ID (formerly Azure AD), and parse the JSON responses to extract relevant sender information. Notably, Liu shows how to handle nested groups and filter for active users, ensuring that results are accurate and actionable.

Tradeoffs and Challenges in Automation

While this approach offers significant advantages, there are important tradeoffs to consider. Automating group management reduces manual effort and improves compliance, but it also requires careful configuration to avoid exposing sensitive data or granting excessive permissions. For example, using undocumented API endpoints can offer powerful capabilities but may pose risks if Microsoft changes these endpoints or restricts access in the future.

Another challenge lies in handling the different types of groups within Microsoft 365. Each group type—whether a Microsoft 365 group, distribution list, or mail-enabled security group—has distinct properties and limitations. The tutorial highlights the need for tailored flows that accommodate these differences, particularly when dealing with nested group structures or non-standard group settings.

Benefits and Future Potential

Despite these challenges, the integration of Power Automate and Graph API opens up new possibilities for organizations to manage communication permissions at scale. Automating the identification and auditing of approved senders not only enhances security but also supports proactive governance by alerting administrators to unauthorized changes or unusual activity.

Looking ahead, as Microsoft continues to evolve its APIs and automation tools, solutions like this one can be further refined. Organizations may choose to extend these workflows, integrating approval processes or real-time notifications to keep stakeholders informed and engaged. In this way, automation becomes not just a tool for efficiency, but a cornerstone of secure and effective collaboration in the digital workplace.

Conclusion: Empowering Administrators with Practical Automation

Isabel Liu’s instructional video serves as a practical guide for IT professionals seeking to balance automation, security, and flexibility in Microsoft 365 group management. By demystifying complex API interactions and addressing real-world challenges, the tutorial empowers administrators to implement smarter, safer workflows.

Ultimately, the tradeoff between convenience and control is at the core of any automation strategy. With careful planning and ongoing monitoring, organizations can leverage Power Automate and Graph API to achieve both, ensuring that their communication channels remain both efficient and secure.

Keywords

Power Automate Graph API approved senders find groups Microsoft Power Automate Graph API tutorial group management approved sender list