This article is contributed. See the original author and article here.

Seems creating O365 Group sites via CSOM not working. We have to use Graph API and this sample should help get started. ROPC authentication is used. Delegated authentication should also work but not tested.


 


Setup Steps:
1] Setup Native App in AAD.
2] Copy the App Id as you will need to provide it later in the code.
3] Provide following Delegated Graph API permissions.


Groups.ReadWite.All, Directory.ReadWrite.All, openid, Team.Create, User.Read 
4] Grant Admin consent.
5] See screenshot below:


SPDev_Support_0-1606358317055.png


 

6] Sample C# code to Create O365 Group site with Teams:


 


 


 

using System;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Collections.Generic;
using System.Threading.Tasks;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System.Text;

namespace CreateGroupMultiGeo
{
    class Program
    {
        static async Task Main(string[] args)
        {
            string clientId = "50168119-04dd-0000-0000-000000000000";
            string email = "someuser@spotenant.onmicrosoft.com";
            string passwordStr = "password

            var req = new HttpRequestMessage(HttpMethod.Post, "https://login.microsoftonline.com/bc8dcd4c-0d60-0000-0000-000000000000/oauth2/token")
            {
                Content = new FormUrlEncodedContent(new Dictionary<string, string>
                {
                    ["resource"] = "https://graph.microsoft.com",
                    ["grant_type"] = "password",
                    ["client_id"] = clientId,
                    ["username"] = email,
                    ["password"] = passwordStr,
                    ["scope"] = "openid"
                })
            };

            HttpClient httpClient = new HttpClient();

            var res = await httpClient.SendAsync(req);

            string json = await res.Content.ReadAsStringAsync();

            if (!res.IsSuccessStatusCode)
            {
                throw new Exception("Failed to acquire token: " + json);
            }
            var result = (JObject)JsonConvert.DeserializeObject(json);
            //create a group

            HttpClient httpClientGroup = new HttpClient();

            httpClientGroup.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", result.Value<string>("access_token"));

            // Create a string variable and get user input from the keyboard and store it in the variable
            string grpName = "MultiGeoGraphAPIGrp1";

            string contentGroup = @"{
              'displayName': '" + grpName + @"',"
              + @"'groupTypes': ['Unified'],
              'mailEnabled': true,
              'mailNickname': '" + grpName + @"',"
              + @"'securityEnabled': false,
              'visibility':'Public',
              'preferredDataLocation':'GBR',
              'owners@odata.bind': ['https://graph.microsoft.com/v1.0/users/ecc0fc81-244b-0000-0000-000000000000']
            }";

            var httpContentGroup = new StringContent(contentGroup, Encoding.GetEncoding("utf-8"), "application/json");

            var responseGroup = httpClientGroup.PostAsync("https://graph.microsoft.com/v1.0/groups", httpContentGroup).Result;

            var content = await responseGroup.Content.ReadAsStringAsync();

            dynamic grp = JsonConvert.DeserializeObject<object>(content);

            Console.WriteLine(responseGroup.Content.ReadAsStringAsync().Result);

            System.Threading.Thread.Sleep(3000);

            //create a Team

            HttpClient httpClientTeam = new HttpClient();

            httpClientTeam.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", result.Value<string>("access_token"));

            //create a team

            string contentTeam = @"{ 
                'memberSettings': { 
                    'allowCreateUpdateChannels': true
                }, 
                'messagingSettings': { 
                    'allowUserEditMessages': true, 
                    'allowUserDeleteMessages': true 
                }, 
                'funSettings': { 
                    'allowGiphy': true, 
                    'giphyContentRating': 'strict' 
                }
            }";

            var httpContentTeam = new StringContent(contentTeam, Encoding.GetEncoding("utf-8"), "application/json");

            ////Refere: https://docs.microsoft.com/en-us/graph/api/team-put-teams?view=graph-rest-1.0&tabs=http
            var responseTeam = httpClientTeam.PutAsync(@"https://graph.microsoft.com/v1.0/groups/" + grp.id + @"/team", httpContentTeam).Result;

            Console.WriteLine(responseTeam.Content.ReadAsStringAsync().Result);

            Console.ReadKey();
        }
    }
}

 


 


 


 


 

 


 


 


 


 


 

Brought to you by Dr. Ware, Microsoft Office 365 Silver Partner, Charleston SC.

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