为Microsoft Graph API获取有效的访问令牌

我正在使用ASP.NET MVC5 Web应用程序进行工作，该应用程序使用Azure ADAL库对用户进行身份验证，但是工作正常，但是，当我手动向图形发送请求时，例如：GET https://graph.microsoft.com/v1.0 / me或GET https://graph.microsoft.com/v1.0/groups？$ filter = from / displayName eq'whatever'。

我尝试更新Azure中的应用程序注册以添加所需的Graph权限，并且我也尝试创建新的应用程序注册，无论我做什么，我的请求将始终响应401未经授权，我缺少什么吗？

编辑：来自邮递员的示例响应

{
  "error": {
    "code": "InvalidAuthenticationToken",
    "message": "Access token validation failure.",
    "innerError": {
      "request-id": "a142576b-acce-4e59-8a8d-adede61aaf59",
      "date": "2017-04-05T13:27:36"
    }
  }
}

编辑：C＃请求示例

public async Task<GroupGraph> GetGroupIdByDisplayName(string displayName)
{
    var accessToken = await authenticationService.GetTokenUserOnly();
    GroupGraph groupGraphResponse = null;
    using (var client = new HttpClient())
    {
        using (var request = new HttpRequestMessage(HttpMethod.Get, $"https://graph.microsoft.com/v1.0/groups?$filter=from/displayName eq '{displayName}'"))
            {
                request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
                using (var response = client.SendAsync(request).Result)
                {
                    if (response.IsSuccessStatusCode)
                    {
                        using (var content = response.Content)
                        {
                            var result = await content.ReadAsStringAsync();
                            groupGraphResponse = JsonConvert.DeserializeObject<GroupGraph>(result);
                        }
                    }
                }
            }
        }
        return groupGraphResponse;
    }

编辑：我获取令牌的方式

public async Task<string> GetTokenUserOnly()
    {
        string signedInUserID = ClaimsPrincipal.Current.FindFirst(ClaimTypes.NameIdentifier).Value;
        string tenantID = ClaimsPrincipal.Current.FindFirst("http://schemas.microsoft.com/identity/claims/tenantid").Value;
        string userObjectID = ClaimsPrincipal.Current.FindFirst("http://schemas.microsoft.com/identity/claims/objectidentifier").Value;

        // get a token for the Graph without triggering any user interaction (from the cache, via multi-resource refresh token, etc)
        ClientCredential clientcred = new ClientCredential(clientId, appKey);
        // initialize AuthenticationContext with the token cache of the currently signed in user, as kept in the app's database
        AuthenticationContext authenticationContext = new AuthenticationContext(aadInstance + tenantID, new TableTokenCache(signedInUserID));
        //AuthenticationResult authenticationResult = await authenticationContext.AcquireTokenSilentAsync(graphResourceID, clientcred, new UserIdentifier(userObjectID, UserIdentifierType.UniqueId));
        AuthenticationResult authenticationResult = authenticationContext.AcquireToken(graphResourceID, clientcred);
        return authenticationResult.AccessToken;
    }