How To Remove Bulk Users From The SharePoint Site

In this blog, you will learn how to remove bulk users from SharePoint site, using CSOM.

In this blog, we will learn about how to remove bulk users from the entire site or from a certain SharePoint group , using CSOM.

Here, we are going to write a code to remove the bulk users from the various sites, which are based on the entries made on a certain SharePoint list. Find the process given below for what we need to do in order to achieve it.

• Create a SharePoint List named "MainList".
• Add the columns named - siteURL(single line of text), usertobeRemoved(single line of text), Output(single line of text) in the MainList
• Add a view in the list with the columns given above in order to retrieve only those columns from the list and name it as MainView.

Column Details

• siteURL(to be filled)- Site from where the user needs to be removed.
• usertobeRemoved(to be filled)- User name, who needs to be removed from the site(siteURL). 
• Output(filled automatically)- Comments once the removal operation has been completed. 

Once the steps given above have been done, create a new console app and add the code given below in order to make it run, as expected. 

Console Application 

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string site = string.Empty;
            string usertobeRemoved = string.Empty;
            ClientContext context = new ClientContext("Site 1"); //Main Site
            Web web = context.Web;
            List oList = web.Lists.GetByTitle("MainList");
            View oView = oList.Views.GetByTitle("MainView");
            context.Load(oView);
            context.ExecuteQuery();
            CamlQuery camlQuery = new CamlQuery();
            camlQuery.ViewXml = oView.ViewQuery;
            ListItemCollection collListItem = oList.GetItems(camlQuery);
            context.Load(collListItem);

            context.ExecuteQuery();

            foreach (ListItem oListItem in collListItem)
            {
                context.Load(oListItem);
                site = Convert.ToString(oListItem["siteURL"]); //retrieves the site url from the list
                usertobeRemoved = Convert.ToString(oListItem["usertobeRemoved"]); //retrieves the user details from the list
                ClientContext context1 = new ClientContext(site);
                User user = context1.Web.EnsureUser(usertobeRemoved); //ensures the user based on the username provided
                    try
                    {
                        context1.Web.SiteUsers.Remove(user); //removes the user
                        context1.ExecuteQuery();
                        oListItem["Output"] = "Removed successfully"; //updates in the column "Output" as "Removed Successfully" if the user has been removed
                        oListItem.Update();
                        context.ExecuteQuery();
                    }
                    catch (Exception)
                    {
                        oListItem["Output"] = "Removed Failure"; //updates in the column "Output" as "Removed Failure" if there is an exception/issue
                        oListItem.Update();
                        context.ExecuteQuery();
                    }
                }


        }
    }
}

Once the console app has been created, fill in the usertobeRemoved, siteURL in the Mainlist. Run the console app created and for verification purposes, the Output column will get updated, so that we can check whether the user has been removed or not from the site.