IOverrideAuthHookWrapperExample.cs

using Microsoft.IdentityModel.Clients.ActiveDirectory;
using System;
using System.Collections.Generic;

namespace MichelOverrideExampleApp
{
    public class MichelOverrideExampleHookImplementation : Microsoft.Xrm.Tooling.Connector.IOverrideAuthHookWrapper
    {
        // In memory cache of access tokens
        Dictionary<string, AuthenticationResult> accessTokens = new Dictionary<string, Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationResult>();

        public void AddAccessToken(Uri orgUri, Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationResult accessToken)
        {
            // Access tokens can be matched on the hostname,
            // different endpoints in the same organization can use the same access token
            accessTokens[orgUri.Host] = accessToken;
        }

        public string GetAuthToken(Uri connectedUri)
        {
            // Check if you have an access token for this host and it's not expired
            if (accessTokens.ContainsKey(connectedUri.Host) && accessTokens[connectedUri.Host].ExpiresOn > DateTime.Now)
            {
                return accessTokens[connectedUri.Host].AccessToken;
            }
            else
            {
                // Try to get or refresh the token
                accessTokens[connectedUri.Host] = GetAccessTokenFromAzureAD(connectedUri);
            }
            return null;
        }

        private AuthenticationResult GetAccessTokenFromAzureAD(Uri orgUrl)
        {
            // TODO: Add your authentication implementation here
            return null;
        }
    }

    public class MichelOverrideExampleProgram
    {
        static void Main(string[] args)
        {
            // Define organization Url
            Uri orgUrl = new Uri("https://organizationname.crm.dynamics.com");

            // Call your existing authentication implementation
            Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationResult accessToken = GetAccessTokenFromAzureAD(orgUrl);

            // Create instance of your hook
            var hook = new MichelOverrideExampleHookImplementation();
            // Add token to your hook
            hook.AddAccessToken(orgUrl, accessToken);

            // Register the hook with the CrmServiceClient
            Microsoft.Xrm.Tooling.Connector.CrmServiceClient.AuthOverrideHook = hook;

            // Create a new instance of CrmServiceClient, pass your organization url and make sure useUniqueInstance = true!
            var client = new Microsoft.Xrm.Tooling.Connector.CrmServiceClient(orgUrl, useUniqueInstance: true);
            if (!client.IsReady)
            {
                // Connection failed, report error
                Console.Error.WriteLine(client.LastCrmException?.Message ?? client.LastCrmError);
            }
            else
            {
                // Connection success
                // TODO Add your code here
                //client.Retrieve("account", Guid.Empty, new ColumnSet("accountid"));
            }
        }

        private static AuthenticationResult GetAccessTokenFromAzureAD(Uri orgUrl)
        {
            // TODO: Add your authentication implementation here
            return null;
        }
    }

}