Microsoft Graph error InvalidAuthenticationToken - microsoft-graph-api

Question

When I trying to retrieve some data from MS Graph I get the following error:
{error: {code: "InvalidAuthenticationToken", message: "Access token validation failure.",…}}
error:{code: "InvalidAuthenticationToken", message: "Access token validation failure.",…}
code:"InvalidAuthenticationToken"
innerError:{request-id: " xxx ", date: "2016-11-28T10:25:52"}
date : "2016-11-28T10:25:52"
request-id: " xxx "
message : "Access token validation failure."
The application is a SharePoint Add-In which should read some user and group information from Office 365.
I use the follwoing code to retrieve the data:
$.ajax({
type: "GET",
url: "https://graph.microsoft.com/v1.0/me/",
headers: {
'Accept': 'application/json',
'Authorization': 'Bearer' + token
}
}).done(function (response) {
console.log(response);
//alert(response);
}).fail(function () {
console.log('Error occurred.');
});
For authenication I use adal.js. After login() I get the id_token. When the request is made the token is passed to the function.
Does anyone has the same issue and could help?
Thanks in advance!

Answer 1

To call the Microsoft Graph REST, we need to provide the access token. The id_token is used by client to verify the sign-in user.
To acquire the deligate access token for the Microsoft Graph REST, we need to make two request. The first request is get the Authorization Code from authorization endpoint. The second request is that exchange the token using the code get from the first request. About the detail request, you can refer the link below:
Microsoft Graph app authentication using Azure AD