Smart search CORS settings

I've not tried doing *, however the following code permits you to specify which websites to add your Azure Search index.

using CMS;
using CMS.DataEngine;
using CMS.Search.Azure;
using CMSApp.SiteModules;
using System.Collections.Generic;

[assembly: RegisterModule(typeof(CustomAzureSearchModule))]

namespace CMSApp.SiteModules
{
    public class CustomAzureSearchModule : Module
    {
        public CustomAzureSearchModule() : base("CustomAzureSearch")
        {

        }

        protected override void OnInit()
        {
            base.OnInit();
            SearchServiceManager.CreatingOrUpdatingIndex.Execute += AddCorsToIndex;
        }

        private void AddCorsToIndex(object sender, CreateOrUpdateIndexEventArgs e)
        {
            Microsoft.Azure.Search.Models.Index index = e.Index;

            index.CorsOptions = new Microsoft.Azure.Search.Models.CorsOptions();
            index.CorsOptions.AllowedOrigins = new List<string>()
            {
                "https://www.yourwebsite.com"
            };
        }

    }
}

This was done on Kentico 12, and needs to be added to the Admin side.