diff --git a/Libraries/Microsoft.Teams.Api/Account.cs b/Libraries/Microsoft.Teams.Api/Account.cs
index 5a3cc3b0..1f78284c 100644
--- a/Libraries/Microsoft.Teams.Api/Account.cs
+++ b/Libraries/Microsoft.Teams.Api/Account.cs
@@ -35,6 +35,49 @@ public class Account
     public Dictionary<string, object>? Properties { get; set; }
 }
 
+/// <summary>
+/// Represents a Teams channel account, extending the basic channel account with Teams-specific properties.
+/// This is used to represent a user or bot in Microsoft Teams conversations.
+/// </summary>
+/// <see href="https://learn.microsoft.com/en-us/dotnet/api/microsoft.bot.schema.teams.teamschannelaccount"/>
+public class TeamsChannelAccount : Account
+{
+    /// <summary>
+    /// Given name (first name) of the user.
+    /// </summary>
+    [JsonPropertyName("givenName")]
+    [JsonPropertyOrder(6)]
+    public string? GivenName { get; set; }
+
+    /// <summary>
+    /// Surname (last name) of the user.
+    /// </summary>
+    [JsonPropertyName("surname")]
+    [JsonPropertyOrder(7)]
+    public string? Surname { get; set; }
+
+    /// <summary>
+    /// Email address of the user.
+    /// </summary>
+    [JsonPropertyName("email")]
+    [JsonPropertyOrder(8)]
+    public string? Email { get; set; }
+
+    /// <summary>
+    /// Unique User Principal Name (UPN) for the user in AAD.
+    /// </summary>
+    [JsonPropertyName("userPrincipalName")]
+    [JsonPropertyOrder(9)]
+    public string? UserPrincipalName { get; set; }
+
+    /// <summary>
+    /// Unique identifier for the user's Azure AD tenant.
+    /// </summary>
+    [JsonPropertyName("tenantId")]
+    [JsonPropertyOrder(10)]
+    public string? TenantId { get; set; }
+}
+
 [JsonConverter(typeof(JsonConverter<Role>))]
 public class Role(string value) : StringEnum(value)
 {
diff --git a/Libraries/Microsoft.Teams.Api/Activities/Events/MeetingParticipantJoinActivity.cs b/Libraries/Microsoft.Teams.Api/Activities/Events/MeetingParticipantJoinActivity.cs
index 4b1fcd9a..264bbfd8 100644
--- a/Libraries/Microsoft.Teams.Api/Activities/Events/MeetingParticipantJoinActivity.cs
+++ b/Libraries/Microsoft.Teams.Api/Activities/Events/MeetingParticipantJoinActivity.cs
@@ -42,7 +42,7 @@ public class Member
         /// </summary>
         [JsonPropertyName("user")]
         [JsonPropertyOrder(0)]
-        public required Account User { get; set; }
+        public required TeamsChannelAccount User { get; set; }
 
         /// <summary>
         /// The participants info.
diff --git a/Libraries/Microsoft.Teams.Api/Activities/Events/MeetingParticipantLeaveActivity.cs b/Libraries/Microsoft.Teams.Api/Activities/Events/MeetingParticipantLeaveActivity.cs
index ca82b901..700e6ce9 100644
--- a/Libraries/Microsoft.Teams.Api/Activities/Events/MeetingParticipantLeaveActivity.cs
+++ b/Libraries/Microsoft.Teams.Api/Activities/Events/MeetingParticipantLeaveActivity.cs
@@ -42,7 +42,7 @@ public class Member
         /// </summary>
         [JsonPropertyName("user")]
         [JsonPropertyOrder(0)]
-        public required Account User { get; set; }
+        public required TeamsChannelAccount User { get; set; }
 
         /// <summary>
         /// The participants info.
diff --git a/Libraries/Microsoft.Teams.Api/Clients/MeetingClient.cs b/Libraries/Microsoft.Teams.Api/Clients/MeetingClient.cs
index 9c8ef2da..b51c57a1 100644
--- a/Libraries/Microsoft.Teams.Api/Clients/MeetingClient.cs
+++ b/Libraries/Microsoft.Teams.Api/Clients/MeetingClient.cs
@@ -64,7 +64,7 @@ public class MeetingParticipant
     /// </summary>
     [JsonPropertyName("user")]
     [JsonPropertyOrder(1)]
-    public Account? User { get; set; }
+    public TeamsChannelAccount? User { get; set; }
 
     /// <summary>
     /// The participant's role in the meeting
diff --git a/Libraries/Microsoft.Teams.Api/Clients/MemberClient.cs b/Libraries/Microsoft.Teams.Api/Clients/MemberClient.cs
index d69c96a2..77cc2c6a 100644
--- a/Libraries/Microsoft.Teams.Api/Clients/MemberClient.cs
+++ b/Libraries/Microsoft.Teams.Api/Clients/MemberClient.cs
@@ -29,17 +29,17 @@ public MemberClient(string serviceUrl, IHttpClientFactory factory, CancellationT
         ServiceUrl = serviceUrl;
     }
 
-    public async Task<List<Account>> GetAsync(string conversationId)
+    public async Task<List<TeamsChannelAccount>> GetAsync(string conversationId)
     {
         var request = HttpRequest.Get($"{ServiceUrl}v3/conversations/{conversationId}/members");
-        var response = await _http.SendAsync<List<Account>>(request, _cancellationToken);
+        var response = await _http.SendAsync<List<TeamsChannelAccount>>(request, _cancellationToken);
         return response.Body;
     }
 
-    public async Task<Account> GetByIdAsync(string conversationId, string memberId)
+    public async Task<TeamsChannelAccount> GetByIdAsync(string conversationId, string memberId)
     {
         var request = HttpRequest.Get($"{ServiceUrl}v3/conversations/{conversationId}/members/{memberId}");
-        var response = await _http.SendAsync<Account>(request, _cancellationToken);
+        var response = await _http.SendAsync<TeamsChannelAccount>(request, _cancellationToken);
         return response.Body;
     }
 
diff --git a/Libraries/Microsoft.Teams.Api/Meetings/Meeting.cs b/Libraries/Microsoft.Teams.Api/Meetings/Meeting.cs
index 0f9d4c9c..6b2760b7 100644
--- a/Libraries/Microsoft.Teams.Api/Meetings/Meeting.cs
+++ b/Libraries/Microsoft.Teams.Api/Meetings/Meeting.cs
@@ -36,5 +36,5 @@ public class Meeting
     /// </summary>
     [JsonPropertyName("organizer")]
     [JsonPropertyOrder(3)]
-    public Account? Organizer { get; set; }
+    public TeamsChannelAccount? Organizer { get; set; }
 }
\ No newline at end of file
diff --git a/Tests/Microsoft.Teams.Api.Tests/Activities/Events/MeetingParticipantJoinActivityTests.cs b/Tests/Microsoft.Teams.Api.Tests/Activities/Events/MeetingParticipantJoinActivityTests.cs
index d7d3cdc3..e5402174 100644
--- a/Tests/Microsoft.Teams.Api.Tests/Activities/Events/MeetingParticipantJoinActivityTests.cs
+++ b/Tests/Microsoft.Teams.Api.Tests/Activities/Events/MeetingParticipantJoinActivityTests.cs
@@ -26,7 +26,7 @@ public MeetingParticipantJoinActivity SetupMeetingParticipantJoinActivity()
                 Members = new List<Member>() {
                     new Member()
                     {
-                        User = new Account()
+                        User = new TeamsChannelAccount()
                         {
                             Id = "userId",
                             Name = "userName"
@@ -39,7 +39,7 @@ public MeetingParticipantJoinActivity SetupMeetingParticipantJoinActivity()
                     },
                     new Member()
                     {
-                        User = new Account()
+                        User = new TeamsChannelAccount()
                         {
                             Id = "botId",
                             Name = "BotUser"
diff --git a/Tests/Microsoft.Teams.Api.Tests/Activities/Events/MeetingParticipantLeaveActivityTests.cs b/Tests/Microsoft.Teams.Api.Tests/Activities/Events/MeetingParticipantLeaveActivityTests.cs
index 44c7a3cb..66cb9dfc 100644
--- a/Tests/Microsoft.Teams.Api.Tests/Activities/Events/MeetingParticipantLeaveActivityTests.cs
+++ b/Tests/Microsoft.Teams.Api.Tests/Activities/Events/MeetingParticipantLeaveActivityTests.cs
@@ -26,7 +26,7 @@ public MeetingParticipantLeaveActivity SetupMeetingParticipantLeaveActivity()
                 Members = new List<Member>() {
                     new Member()
                     {
-                        User = new Account()
+                        User = new TeamsChannelAccount()
                         {
                             Id = "userId",
                             Name = "userName"
@@ -39,7 +39,7 @@ public MeetingParticipantLeaveActivity SetupMeetingParticipantLeaveActivity()
                     },
                     new Member()
                     {
-                        User = new Account()
+                        User = new TeamsChannelAccount()
                         {
                             Id = "botId",
                             Name = "BotUser"
diff --git a/Tests/Microsoft.Teams.Api.Tests/Clients/MeetingClientTests.cs b/Tests/Microsoft.Teams.Api.Tests/Clients/MeetingClientTests.cs
index 700c7ae4..abf43607 100644
--- a/Tests/Microsoft.Teams.Api.Tests/Clients/MeetingClientTests.cs
+++ b/Tests/Microsoft.Teams.Api.Tests/Clients/MeetingClientTests.cs
@@ -56,7 +56,7 @@ public async Task MeetingClient_GetParticipantAsync()
                 Body = new MeetingParticipant
                 {
                     Id = "participant1",
-                    User = new Account { Id = "user1", Name = "John Doe" },
+                    User = new TeamsChannelAccount { Id = "user1", Name = "John Doe" },
                     Role = "Presenter",
                     IsOrganizer = true,
                     JoinTime = DateTime.UtcNow
diff --git a/Tests/Microsoft.Teams.Api.Tests/Clients/MemberClientTests.cs b/Tests/Microsoft.Teams.Api.Tests/Clients/MemberClientTests.cs
index d102809c..54fa20d5 100644
--- a/Tests/Microsoft.Teams.Api.Tests/Clients/MemberClientTests.cs
+++ b/Tests/Microsoft.Teams.Api.Tests/Clients/MemberClientTests.cs
@@ -16,15 +16,15 @@ public async Task MemberClient_GetAsync()
         responseMessage.Headers.Add("Custom-Header", "HeaderValue");
         var mockHandler = new Mock<IHttpClient>();
         mockHandler
-            .Setup(handler => handler.SendAsync<List<Account>>(It.IsAny<IHttpRequest>(), It.IsAny<CancellationToken>()))
-            .ReturnsAsync(new HttpResponse<List<Account>>()
+            .Setup(handler => handler.SendAsync<List<TeamsChannelAccount>>(It.IsAny<IHttpRequest>(), It.IsAny<CancellationToken>()))
+            .ReturnsAsync(new HttpResponse<List<TeamsChannelAccount>>()
             {
                 Headers = responseMessage.Headers,
                 StatusCode = HttpStatusCode.OK,
-                Body = new List<Account>
+                Body = new List<TeamsChannelAccount>
                 {
-                    new Account { Id = "member1", Name = "User 1" },
-                    new Account { Id = "member2", Name = "User 2" }
+                    new TeamsChannelAccount { Id = "member1", Name = "User 1" },
+                    new TeamsChannelAccount { Id = "member2", Name = "User 2" }
                 }
             });
 
@@ -39,7 +39,7 @@ public async Task MemberClient_GetAsync()
 
         string expectedUrl = "https://serviceurl.com/v3/conversations/conv123/members";
         HttpMethod expectedMethod = HttpMethod.Get;
-        mockHandler.Verify(x => x.SendAsync<List<Account>>(
+        mockHandler.Verify(x => x.SendAsync<List<TeamsChannelAccount>>(
             It.Is<IHttpRequest>(arg => arg.Url == expectedUrl && arg.Method == expectedMethod),
             It.IsAny<CancellationToken>()),
             Times.Once);
@@ -52,12 +52,12 @@ public async Task MemberClient_GetByIdAsync()
         responseMessage.Headers.Add("Custom-Header", "HeaderValue");
         var mockHandler = new Mock<IHttpClient>();
         mockHandler
-            .Setup(handler => handler.SendAsync<Account>(It.IsAny<IHttpRequest>(), It.IsAny<CancellationToken>()))
-            .ReturnsAsync(new HttpResponse<Account>()
+            .Setup(handler => handler.SendAsync<TeamsChannelAccount>(It.IsAny<IHttpRequest>(), It.IsAny<CancellationToken>()))
+            .ReturnsAsync(new HttpResponse<TeamsChannelAccount>()
             {
                 Headers = responseMessage.Headers,
                 StatusCode = HttpStatusCode.OK,
-                Body = new Account { Id = "member1", Name = "User 1" }
+                Body = new TeamsChannelAccount { Id = "member1", Name = "User 1" }
             });
 
         string serviceUrl = "https://serviceurl.com/";
@@ -72,7 +72,7 @@ public async Task MemberClient_GetByIdAsync()
 
         string expectedUrl = "https://serviceurl.com/v3/conversations/conv123/members/member1";
         HttpMethod expectedMethod = HttpMethod.Get;
-        mockHandler.Verify(x => x.SendAsync<Account>(
+        mockHandler.Verify(x => x.SendAsync<TeamsChannelAccount>(
             It.Is<IHttpRequest>(arg => arg.Url == expectedUrl && arg.Method == expectedMethod),
             It.IsAny<CancellationToken>()),
             Times.Once);
diff --git a/Tests/Microsoft.Teams.Apps.Tests/Activities/Events/MeetingJoinEventTests.cs b/Tests/Microsoft.Teams.Apps.Tests/Activities/Events/MeetingJoinEventTests.cs
index a536e47c..b18e0738 100644
--- a/Tests/Microsoft.Teams.Apps.Tests/Activities/Events/MeetingJoinEventTests.cs
+++ b/Tests/Microsoft.Teams.Apps.Tests/Activities/Events/MeetingJoinEventTests.cs
@@ -47,7 +47,7 @@ public async Task Should_CallHandler_OnMeetingJoinEvent()
                 {
                     new MeetingParticipantJoinActivityValue.Member
                     {
-                        User = new Account { Id = "user1", Name = "Test User" },
+                        User = new TeamsChannelAccount { Id = "user1", Name = "Test User" },
                         Meeting = new MeetingParticipantJoinActivityValue.Meeting
                         {
                             InMeeting = true,
@@ -103,7 +103,7 @@ public void MeetingJoinAttribute_Select_ReturnsTrueForMeetingJoinActivity()
                 {
                     new MeetingParticipantJoinActivityValue.Member
                     {
-                        User = new Account { Id = "user1", Name = "Test User" },
+                        User = new TeamsChannelAccount { Id = "user1", Name = "Test User" },
                         Meeting = new MeetingParticipantJoinActivityValue.Meeting
                         {
                             InMeeting = true,
@@ -148,7 +148,7 @@ public async Task MeetingJoinAttribute_Controller_Call()
                 {
                     new MeetingParticipantJoinActivityValue.Member
                     {
-                        User = new Account { Id = "user1", Name = "Test User" },
+                        User = new TeamsChannelAccount { Id = "user1", Name = "Test User" },
                         Meeting = new MeetingParticipantJoinActivityValue.Meeting
                         {
                             InMeeting = true,
diff --git a/Tests/Microsoft.Teams.Apps.Tests/Activities/Events/MeetingLeaveEventTests.cs b/Tests/Microsoft.Teams.Apps.Tests/Activities/Events/MeetingLeaveEventTests.cs
index f75ba98b..9170c09b 100644
--- a/Tests/Microsoft.Teams.Apps.Tests/Activities/Events/MeetingLeaveEventTests.cs
+++ b/Tests/Microsoft.Teams.Apps.Tests/Activities/Events/MeetingLeaveEventTests.cs
@@ -49,7 +49,7 @@ public async Task Should_CallHandler_OnMeetingLeaveEvent()
                 {
                     new MeetingParticipantLeaveActivityValue.Member
                     {
-                        User = new Account { Id = "user1", Name = "Test User" },
+                        User = new TeamsChannelAccount { Id = "user1", Name = "Test User" },
                         Meeting = new MeetingParticipantLeaveActivityValue.Meeting
                         {
                             InMeeting = true,
@@ -105,7 +105,7 @@ public void MeetingLeaveAttribute_Select_ReturnsTrueForMeetingLeaveActivity()
                 {
                     new MeetingParticipantLeaveActivityValue.Member
                     {
-                        User = new Account { Id = "user1", Name = "Test User" },
+                        User = new TeamsChannelAccount { Id = "user1", Name = "Test User" },
                         Meeting = new MeetingParticipantLeaveActivityValue.Meeting
                         {
                             InMeeting = true,
@@ -150,7 +150,7 @@ public async Task MeetingLeaveAttribute_Controller_Call()
                 {
                     new MeetingParticipantLeaveActivityValue.Member
                     {
-                        User = new Account { Id = "user1", Name = "Test User" },
+                        User = new TeamsChannelAccount { Id = "user1", Name = "Test User" },
                         Meeting = new MeetingParticipantLeaveActivityValue.Meeting
                         {
                             InMeeting = true,