Microsoft Graph API Mail.Send Access Denied

Question

I am having problems to send mails using Microsoft Graph.

I did the following:

1. I created an app of type : Multiple organizations
2. After that, I created a secret in my App.
3. Later, I added the following permissions:

This permissions was aproved by an admin.

4. I get a token using the following code:

var clientSecret = @"{My generated Secret in Azure}";
var clientId = @"{My Client Id}";
var tenantID = @"{My Tenant Id}";
IConfidentialClientApplication app= ConfidentialClientApplicationBuilder
.Create(clientId)
.WithTenantId(tenantID)
.WithClientSecret(clientSecret)
.Build();

result = await app.AcquireTokenForClient(scopes)
.ExecuteAsync();

5. With this token I did a call to the api https://graph.microsoft.com/v1.0/me/sendMail from postman to test the token,but postman is returning this error:

{
"error": {
"code": "ErrorAccessDenied",
"message": "Access is denied. Check credentials and try again."
}
}

IS there some additional configuration or miss configuration I am doing?

These are the values of the token:

Answer 1

I found the problem, I was using an incorrect url.

For the case of Applications permissions we must use https://graph.microsoft.com/v1.0/users/{userId}/sendMail.