diff --git a/libraries/Microsoft.Bot.Connector/Authentication/ManagedIdentityAuthenticator.cs b/libraries/Microsoft.Bot.Connector/Authentication/ManagedIdentityAuthenticator.cs
index 14ced8afba..1982ac2e4c 100644
--- a/libraries/Microsoft.Bot.Connector/Authentication/ManagedIdentityAuthenticator.cs
+++ b/libraries/Microsoft.Bot.Connector/Authentication/ManagedIdentityAuthenticator.cs
@@ -8,6 +8,7 @@
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Logging.Abstractions;
 using Microsoft.Identity.Client;
+using Microsoft.Identity.Client.AppConfig;
 
 namespace Microsoft.Bot.Connector.Authentication
 {
@@ -16,10 +17,9 @@ namespace Microsoft.Bot.Connector.Authentication
     /// </summary>
     public class ManagedIdentityAuthenticator : IAuthenticator
     {
-        private readonly string _appId;
         private readonly string _resource;
         private readonly ILogger _logger;
-        private readonly IConfidentialClientApplication _clientApplication;
+        private readonly IManagedIdentityApplication _clientApplication;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="ManagedIdentityAuthenticator"/> class.
@@ -40,7 +40,6 @@ public ManagedIdentityAuthenticator(string appId, string resource, HttpClient cu
                 throw new ArgumentNullException(nameof(resource));
             }
             
-            _appId = appId;
             _resource = resource;
             _logger = logger ?? NullLogger.Instance;
             _clientApplication = CreateClientApplication(appId, customHttpClient);
@@ -63,10 +62,8 @@ public async Task<AuthenticatorResult> GetTokenAsync(bool forceRefresh = false)
 
         private async Task<AuthenticatorResult> AcquireTokenAsync(bool forceRefresh)
         {
-            var scopes = new string[] { $"{_resource}/.default" };
             var authResult = await _clientApplication
-                .AcquireTokenForClient(scopes)
-                .WithManagedIdentity(_appId)
+                .AcquireTokenForManagedIdentity(_resource)
                 .WithForceRefresh(forceRefresh)
                 .ExecuteAsync()
                 .ConfigureAwait(false);
@@ -86,10 +83,9 @@ private RetryParams HandleTokenProviderException(Exception e, int retryCount)
                 : RetryParams.DefaultBackOff(retryCount);
         }
 
-        private IConfidentialClientApplication CreateClientApplication(string appId, HttpClient customHttpClient = null)
+        private IManagedIdentityApplication CreateClientApplication(string appId, HttpClient customHttpClient = null)
         {
-            var clientBuilder = ConfidentialClientApplicationBuilder.Create(appId)
-               .WithExperimentalFeatures();
+            var clientBuilder = ManagedIdentityApplicationBuilder.Create(ManagedIdentityId.WithUserAssignedClientId(appId));
 
             if (customHttpClient != null)
             {
diff --git a/libraries/Microsoft.Bot.Connector/Microsoft.Bot.Connector.csproj b/libraries/Microsoft.Bot.Connector/Microsoft.Bot.Connector.csproj
index 5fc5f2f36b..74e4ca28a7 100644
--- a/libraries/Microsoft.Bot.Connector/Microsoft.Bot.Connector.csproj
+++ b/libraries/Microsoft.Bot.Connector/Microsoft.Bot.Connector.csproj
@@ -29,7 +29,7 @@
     <PackageReference Include="Microsoft.CSharp" Version="4.5.0" />
     <PackageReference Include="Microsoft.Extensions.Logging" Version="2.1.0" />
     <PackageReference Include="Microsoft.Extensions.Http" Version="2.1.0" />
-    <PackageReference Include="Microsoft.Identity.Client" Version="4.50.0" />
+    <PackageReference Include="Microsoft.Identity.Client" Version="4.55.0" />
     <PackageReference Include="Microsoft.IdentityModel.Protocols.OpenIdConnect" Version="5.6.0" />
     <PackageReference Include="Microsoft.Rest.ClientRuntime" Version="2.3.24" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
diff --git a/tests/Microsoft.Bot.Connector.Tests/Authentication/ManagedIdentityAuthenticatorTests.cs b/tests/Microsoft.Bot.Connector.Tests/Authentication/ManagedIdentityAuthenticatorTests.cs
index 7ccab5f4e6..9915504cfe 100644
--- a/tests/Microsoft.Bot.Connector.Tests/Authentication/ManagedIdentityAuthenticatorTests.cs
+++ b/tests/Microsoft.Bot.Connector.Tests/Authentication/ManagedIdentityAuthenticatorTests.cs
@@ -16,8 +16,8 @@ namespace Microsoft.Bot.Connector.Tests.Authentication
 {
     public class ManagedIdentityAuthenticatorTests
     {
-        private const string TestAppId = "foo";
-        private const string TestAudience = "bar";
+        private readonly Func<string, string> appId = (id) => $"id {id} ";
+        private readonly Func<string, string> audience = (id) => $"audience {id} ";
 
         [Fact]
         public void CanGetJwtToken()
@@ -37,7 +37,7 @@ public void CanGetJwtToken()
                 .ReturnsAsync(response);
             var httpClient = new HttpClient(mockHttpMessageHandler.Object);
 
-            var sut = new ManagedIdentityAuthenticator(TestAppId, TestAudience, httpClient);
+            var sut = new ManagedIdentityAuthenticator(appId(nameof(CanGetJwtToken)), audience(nameof(CanGetJwtToken)), httpClient);
             var token = sut.GetTokenAsync().GetAwaiter().GetResult();
 
             Assert.Equal("at_secret", token.AccessToken);
@@ -45,9 +45,9 @@ public void CanGetJwtToken()
         }
 
         [Theory]
-        [InlineData(false)]
-        [InlineData(true)]
-        public void CanGetJwtTokenWithForceRefresh(bool forceRefreshInput)
+        [InlineData(false, 1)]
+        [InlineData(true, 2)]
+        public void CanGetJwtTokenWithForceRefresh(bool forceRefreshInput, int index)
         {
             var response = new HttpResponseMessage(HttpStatusCode.OK);
             var expiresOn = DateTimeOffset.Now.ToUnixTimeSeconds() + 10000;
@@ -64,7 +64,7 @@ public void CanGetJwtTokenWithForceRefresh(bool forceRefreshInput)
                 .ReturnsAsync(response);
             var httpClient = new HttpClient(mockHttpMessageHandler.Object);
 
-            var sut = new ManagedIdentityAuthenticator(TestAppId, TestAudience, httpClient);
+            var sut = new ManagedIdentityAuthenticator(appId(nameof(CanGetJwtTokenWithForceRefresh)) + index, audience(nameof(CanGetJwtTokenWithForceRefresh)) + index, httpClient);
             var token = sut.GetTokenAsync(forceRefreshInput).GetAwaiter().GetResult();
 
             Assert.Equal("at_secret", token.AccessToken);
@@ -86,7 +86,7 @@ public void DefaultRetryOnException()
                 });
             var httpClient = new HttpClient(mockHttpMessageHandler.Object);
 
-            var sut = new ManagedIdentityAuthenticator(TestAppId, TestAudience, httpClient);
+            var sut = new ManagedIdentityAuthenticator(appId(nameof(DefaultRetryOnException)), audience(nameof(DefaultRetryOnException)), httpClient);
 
             try
             {
@@ -130,7 +130,7 @@ public void CanRetryAndAcquireToken()
                 });
             var httpClient = new HttpClient(mockHttpMessageHandler.Object);
 
-            var sut = new ManagedIdentityAuthenticator(TestAppId, TestAudience, httpClient);
+            var sut = new ManagedIdentityAuthenticator(appId(nameof(CanRetryAndAcquireToken)), audience(nameof(CanRetryAndAcquireToken)), httpClient);
             var token = sut.GetTokenAsync().GetAwaiter().GetResult();
 
             Assert.Equal("at_secret", token.AccessToken);