Power Platform

When working with Microsoft Graph API inside Power Automate or Power Apps, many developers face this error: /me request is only valid with delegated authentication flow.   This happens because the HTTP connector with client credentials only works with application permissions , which do not provide a user context. If you need to call Graph API endpoints like /me , /me/messages , or /me/events , you must use delegated authentication . The best way to achieve this in Power Platform is by creating a Custom Connector with OAuth2 delegated flow . Step 1: Register an App in Azure AD  (Refer for more details: https://mspowerplatformtips.blogspot.com/2025/04/step-by-step-guide-power-automate.html ) Go to Azure Portal → Azure Active Directory → App registrations → New registration . Give your app a name (eg: Graph API Power Automate). Save the app and note down: Application (client) ID Directory (tenant) ID Step 2: Configure API Permissions In your register...

Step 1: Open Power Automate, navigate to the Custom Connectors tab, and select Create from blank as shown in the image below. custom connector(click image for better resolution) Step 2: In the General tab, upload an icon (less than 1MB), add a description, select the correct scheme (in my case, HTTPS ), and provide the host name. For example, if your API URL is https://graph.microsoft.com/v1.0/users/{email} , the host name will be the highlighted part — graph.microsoft.com . Step 3: Go to the Security tab. Here, you need to select the authentication method. Choose OAuth 2.0 as the authentication type, as shown in the image below. Step 4: Select the Identity Provider as Azure Active Directory . Check the box Enable Service Principal Support . This option allows you to create a connection using a Client ID and Client Secret instead of using the user's own authentication. Next, provide the Client ID , Client Secret , Tenant ID , and other required details as shown in t...

Step 1: You should have an Azure subscription, or if you have access to the Microsoft Entra Admin Center, you can create an app from there. This app can then be used in Power Automate to connect to Microsoft Graph API. Step 2: Click on "New registration" , provide a name for your app, assign the required API permissions (such as Microsoft Graph permissions), and then click "Register" to complete the app registration process. Step 3: After registration, you'll be redirected to the app's overview page. From there, navigate to the API permissions tab and click "Add a permission" to assign the necessary Microsoft Graph API permissions. Step 4: Select Microsoft Graph as the API, and based on your requirements, choose the appropriate permissions. In my case, I selected Application permissions , which do not require user sign-in and are suitable for background services or automation. Step 5: Select the required Microsoft Graph API permissions. Yo...