Azure Invalid Client Secret Provided Error: Causes and Fixes

The Azure Invalid Client Secret Provided Error can be frustrating, but don't worry, we've got you covered. This error occurs when the client secret provided is invalid, expired, or not correctly formatted.

The client secret is a crucial component of Azure Active Directory (AAD) authentication, and a single character mismatch can cause the error. The secret is usually a 32-character string.

To troubleshoot this issue, check if the client secret has expired or been changed recently. If so, update the secret in the Azure portal or your application's configuration.

A common cause of this error is entering the client secret incorrectly, so double-check your entry for any typos or formatting issues.

If you're experiencing the "Error: invalid_client, Description: AADSTS7000215: Invalid client secret provided" message, you're not alone. This error is often caused by an invalid or missing client secret.

To troubleshoot this issue, check if you've missed any security user permissions or Azure Active Directory Application card, as seen in Example 1. This was the case for one user who had to add the missing permission to resolve the issue.

The error can also occur if you're using an outdated or incorrect client secret. In this case, removing the optional client secret from the Passport library item and checking in your device may resolve the issue, as mentioned in Example 2.

If you're still experiencing issues, try connecting to a mobile hotspot to rule out network conditions. This troubleshooting step can help determine if the error is related to your network connection.

Here are some common error messages related to the "invalid_client" error:

These error messages can be caused by a variety of factors, including missing client secrets, outdated client secrets, and network conditions. By understanding the common causes of these errors, you can take the necessary steps to resolve the issue and get back to work.

You might have copied the secret improperly, and the easiest way to test a client id/secret is using PnP, which will give you an error if the combo is not valid.

If the PnP Command works, but your Postman fails, then there's something wrong with your credential flow, although it seems to look OK to me.

It's possible the client secret was revoked, and you can confirm this by going into Azure AD and finding your app under Enterprise Applications.

You won't see the actual secret but you will see if one exists, and you can also generate new secrets from here if you need to, assuming you have the right permissions.

Make sure you replace the + char in your key with "%2B" if you have one, as this can cause issues.

You can find the answer to this problem at the following links: https://www.outsystems.com/forums/discussion/53348/sharepoint-postoauth-error-invalid-client-secret-is-provided/ and https://www.outsystems.com/forums/discussion/22572/outsystems-encoding-issue-in-restapi-content-type-application-x-www-form-urlenco/.