Issues Integrating Microsoft Graph API for User Authentication on My Website

Question

Hi Community,

I’m working on integrating Microsoft Graph API with my website to enable user authentication and access to Microsoft 365 data, but I’m encountering some roadblocks.

Context:

1. My website uses a React frontend and a Node.js backend.
2. I’m implementing OAuth 2.0 for user authentication via Azure AD.
3. I want to fetch user details, including their calendar and email data, after successful login.

Problems Faced:

1. Token Retrieval Error: After successful user login, when exchanging the authorization code for an access token, I’m receiving an error:Hi Community, I’m working on integrating Microsoft Graph API with my website to enable user authentication and access to Microsoft 365 data, but I’m encountering some roadblocks. Context:
   1. My website uses a React frontend and a Node.js backend.
   2. I’m implementing OAuth 2.0 for user authentication via Azure AD.
   3. I want to fetch user details, including their calendar and email data, after successful login.
   Problems Faced:
   1. Token Retrieval Error: After successful user login, when exchanging the authorization code for an access token, I’m receiving an error: { "error": "invalid_client", "error_description": "AADSTS7000215: Invalid client secret is provided." }
      1. I’ve double-checked the client secret in Azure AD and ensured it matches the value used in my application.
      2. Permission Scopes Issue: Even after setting up API permissions in Azure AD (e.g., User.Read, Calendars.Read), some API calls return a 403 Forbidden error. It seems like the permissions aren’t being applied correctly during token generation.
      3. Redirect URI Mismatch: Occasionally, I get an error stating "The redirect URI is not registered in the application." I’ve ensured the URI matches the one registered in Azure AD but still encounter this sporadically.
      4. Fetching Data with Graph API: When calling https://graph.microsoft.com/v1.0/me, the response sometimes returns a truncated set of user data, or the request times out without completing.
      What I’ve Tried:
      • Regenerated the client secret and updated it in my application.
      • Verified and re-added the redirect URIs in the Azure portal.
      • Added both delegated and application permissions for the required Graph API scopes in Azure AD.
      • Tested the Graph API calls using the Graph Explorer tool, where they work fine, but the same fails from my application.
      Questions:
      1. How can I ensure that the client secret and redirect URIs are set up correctly to avoid intermittent issues?
      2. Are there additional steps required to apply API permissions correctly for the access token?
      3. Why might the data fetched from https://graph.microsoft.com/v1.0/me be incomplete or inconsistent?
      4. Is there a way to debug or trace the token flow to identify where it might be failing?
      Any guidance or examples of successful integration setups would be highly appreciated. Thanks in advance for your help!
   2. I’ve double-checked the client secret in Azure AD and ensured it matches the value used in my application.
   3. Permission Scopes Issue: Even after setting up API permissions in Azure AD (e.g., User.Read, Calendars.Read), some API calls return a 403 Forbidden error. It seems like the permissions aren’t being applied correctly during token generation.
   4. Redirect URI Mismatch: Occasionally, I get an error stating "The redirect URI is not registered in the application." I’ve ensured the URI matches the one registered in Azure AD but still encounter this sporadically.
   5. Fetching Data with Graph API: When calling https://graph.microsoft.com/v1.0/me, the response sometimes returns a truncated set of user data, or the request times out without completing.
   What I’ve Tried:
   1. Regenerated the client secret and updated it in my application.
   2. Verified and re-added the redirect URIs in the Azure portal.
   3. Added both delegated and application permissions for the required Graph API scopes in Azure AD.
   4. Tested the Graph API calls using the Graph Explorer tool, where they work fine, but the same fails from my application.
   Questions:
   1. How can I ensure that the client secret and redirect URIs are set up correctly to avoid intermittent issues?
   2. Are there additional steps required to apply API permissions correctly for the access token?
   3. Why might the data fetched from https://graph.microsoft.com/v1.0/me be incomplete or inconsistent?
   4. Is there a way to debug or trace the token flow to identify where it might be failing? Any guidance or examples of successful integration setups would be highly appreciated. Thanks in advance for your help!