CODEWITHSUNDEEP
microsoft-graph-api
vela
vela

Reputation: 147

How to acces some one's inbox with Application permission using MS Graph Api

i want to use the Graph Api to access the o365 inbox to process the incoming mails.without user signed in ( Application permission) .

with that i can able to get the access token but i cant able to access the inbox. and the code as follows.

//Defining app
app = ConfidentialClientApplicationBuilder.Create(config.ClientId)
            .WithClientSecret(config.ClientSecret)
            .WithAuthority(new Uri(config.Authority))
            .Build();


//Getting access token
result = await app.AcquireTokenForClient(scopes)
                .ExecuteAsync();
//graph service client
GraphServiceClient graphClient = new GraphServiceClient(new
DelegateAuthenticationProvider(async (requestMessage) =>
            {
                requestMessage.Headers.Authorization = new AuthenticationHeaderValue("bearer", result.AccessToken);
            }));
//accessing Ms graph api 
var messages = await graphClient.Me.Messages
                                .Request()
                                .Select(e => new {
                                    e.Sender,
                                    e.Subject
                                })
                                .GetAsync();

Code: BadRequest Message: Current authenticated context is not valid for this request. This occurs when a request is made to an endpoint that requires user sign-in. For example, /me requires a signed-in user. Acquire a token on behalf of a user to make requests to these endpoints. Use the OAuth 2.0 authorization code flow for mobile and native apps and the OAuth 2.0 implicit flow for single-page web apps.

Inner error

I dont know what i am doing wrong here please help me

Upvotes: 0

Views: 233

Answers (1)

Jason Johnston
Jason Johnston

Reputation: 17702

You cannot use .Me since there is no authenticated user. You need to instead do something like:

//accessing Ms graph api 
var messages = await graphClient.Users["user-id"].Messages
                                .Request()
                                .Select(e => new {
                                    e.Sender,
                                    e.Subject
                                })
                                .GetAsync();

Where user-id is either the user's id from Graph, or their UPN (typically their email address).

Upvotes: 2

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