How To Set The User As Owner For All The Groups In A SharePoint Online Site Using CSOM

In this blog, you will see how to set the user as an owner for all the groups in a SharePoint Online site, using CSOM.

In this blog, you will see how to set the user as an owner for all the groups in a SharePoint Online site, using CSOM. Please refer my previous article Connect To SharePoint 2013 Online Using CSOM With Console Application

Code Snippet

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Security;
using System.Text;
using System.Threading.Tasks;
using Microsoft.SharePoint.Client;

namespace UpdateGroupOwners
{
    class Program
    {
        static void Main(string[] args)
        {
            string userName = "[email protected]";
            string siteURL = "https://c986.sharepoint.com/sites/Vijai";
            string user = "[email protected]";
            Console.WriteLine("Enter your password.");
            SecureString password = GetPassword();

            // ClienContext - Get the context for the SharePoint Online Site
            using (var clientContext = new ClientContext(siteURL))
            {
                // SharePoint Online Credentials
                clientContext.Credentials = new SharePointOnlineCredentials(userName, password);

                // Get the SharePoint web
                Web web = clientContext.Web;

                // Get all the site groups
                GroupCollection groupColl = web.SiteGroups;

                // Ensure the user
                User ownerUser = web.EnsureUser(user);

                // Load the site group properties
                clientContext.Load(groupColl);

                // Execute the query to the server.
                clientContext.ExecuteQuery();

                // Loop through all the site groups
                foreach (Group group in groupColl)
                {
                    // Display the group title
                    Console.WriteLine("GroupName: " + group.Title + "-- GroupOwnerTitle: " + group.OwnerTitle);

                    // Update the owner
                    group.Owner = ownerUser;
                    group.Update();
                    clientContext.Load(group);

                    // Execute the query to the server.
                    clientContext.ExecuteQuery();
                    Console.WriteLine("UpdatedOwnerTitle: " + group.OwnerTitle);
                }

                Console.ReadLine();
            }
        }

        private static SecureString GetPassword()
        {
            ConsoleKeyInfo info;
            //Get the user's password as a SecureString
            SecureString securePassword = new SecureString();
            do
            {
                info = Console.ReadKey(true);
                if (info.Key != ConsoleKey.Enter)
                {
                    securePassword.AppendChar(info.KeyChar);
                }
            }
            while (info.Key != ConsoleKey.Enter);
            return securePassword;
        }
    }
}