从O365中获取users到D365中

用D365 online可能会遇到这样的问题。  顾客需要获取O365 user的email address 发email使用。 但是又不想给这部分的users licenses。 

那我们就可以通过graph api来获取这部分的users

我们首先可以通过 graph explorer来检查下索要获取的restful api

https://developer.microsoft.com/en-us/graph/graph-explorer

在我们开始写代码获取O365用户之前， 我们需要在portal.azure中注册一个application。

首先，我们需要register application并且需要add a permission。

在这里要注意了， 我们需要选择application permissions 而不是delegated permission。

两者区别在于application permission在赋予admin consent 权限之后不需要再次有弹出框登录。而delegated permission则需要每次都有弹出框来登录。

 其次，我们要找到User.Read.All 并且选中

最后，我们需要给与User.Read.All 权限

这里需要注意的是 Application ID， Directory ID 和 Secret Key是需要的

 接下来我们就需要写一个接口。

我们可以把这个接口用Microsoft flow每天凌晨call 做O365 users  同步。

                var tenant = "";
                var clientId = "";
                var secret = "";

                var tokenAuth = "https://login.microsoftonline.com/" + tenant + "/oauth2/v2.0/token";
                var authStr = "&client_id=" + clientId
                                + "&client_secret=" + HttpUtility.UrlEncode(secret)
                                + "&scope=https%3A%2F%2Fgraph.microsoft.com%2F.default&grant_type=client_credentials";
                HttpContent content = new StringContent(authStr, Encoding.UTF8, "application/x-www-form-urlencoded");
                HttpClient httpClient = new HttpClient();
                var httpClientResponse = httpClient.PostAsync(tokenAuth, content).Result;
                var contents = httpClientResponse.Content.ReadAsStringAsync().Result;

                TokenResult tokenResult = JsonConvert.DeserializeObject<TokenResult>(contents);
                var query = "https://graph.microsoft.com/v1.0/users/";

                using (var client = new HttpClient())
                {using (var request = new HttpRequestMessage(HttpMethod.Get, query))
                    {
                        request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
                        request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", tokenResult.access_token);

                        using (var response = client.SendAsync(request).GetAwaiter().GetResult())
                        {if (response.IsSuccessStatusCode)
                            {
                                var jsonString = response.Content.ReadAsStringAsync().GetAwaiter().GetResult();
                                var jo = JsonConvert.DeserializeObject<JObject>(jsonString);
                                var ja = JsonConvert.DeserializeObject<JArray>(jo["value"].ToString());
                                if (ja.Count != 0)
                                {
                                    for (int i = O365UsersIndexNo; i < ja.Count; i++)
                                    {
                                        JToken item = ja[i];
                                        var displayName = item["displayName"].ToString();
                                        var domainName = item["userPrincipalName"].ToString();

                                        var account = ConfigurationManager.AppSettings["UserName"];
                                        var password = ConfigurationManager.AppSettings["Password"];
                                        var dhlResourceUrl = "https://xxx.crm5.dynamics.com/";
                                        var crmClientId = ConfigurationManager.AppSettings["ClientId"];
                                        var weburi = dhlResourceUrl + "api/data/v9.1/new_o365users";
                                        AuthenticationContext authContext = new AuthenticationContext("https://login.windows.net/common", false);
                                        AuthenticationResult result = authContext.AcquireToken(dhlResourceUrl, crmClientId, new UserCredential(account, password));
                                        HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(weburi);

                                        req.Method = "post";
                                        req.Accept = "application/json";
                                        req.ContentType = "application/json; charset=utf-8";
                                        req.Headers.Add("OData-MaxVersion", "4.0");
                                        req.Headers.Add("OData-Version", "4.0");
                                        req.Headers.Set("Authorization", "Bearer " + result.AccessToken);
                                        req.Headers.Set("If-None-Match", "*");
                                        ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;

                                        var newO365User = new JObject();
                                        if (!string.IsNullOrEmpty(displayName) && !string.IsNullOrEmpty(domainName))
                                        {
                                            newO365User.Add("emailaddress", domainName);
                                            newO365User.Add("new_fullname", displayName);
                                            newO365User.Add("new_domainname", domainName);
                                        }
                                        else
                                        {
                                            continue;
                                        }
                                        byte[] data = Encoding.UTF8.GetBytes(newO365User.ToString());
                                        Stream newStream = req.GetRequestStream();
                                        newStream.Write(data, 0, data.Length);
                                        newStream.Close();
                                        using (HttpWebResponse res = (HttpWebResponse)req.GetResponse())
                                        {
                                            StreamReader read = new StreamReader(res.GetResponseStream());
                                        }
                                    }
                                }
                            }
                        }
                    }
                }

如果我们需要获取当前新创建的O365 users， API query是这样的