diff --git a/Samples/Common/Sample.Common.Beta/Meetings/JoinInfo.cs b/Samples/Common/Sample.Common.Beta/Meetings/JoinInfo.cs
index ad7ff546b..be6402806 100644
--- a/Samples/Common/Sample.Common.Beta/Meetings/JoinInfo.cs
+++ b/Samples/Common/Sample.Common.Beta/Meetings/JoinInfo.cs
@@ -21,20 +21,42 @@ public class JoinInfo
     {
         /// <summary>
         /// Parse Join URL into its components.
+        /// NOTE: This method only works with the OLD Teams meeting URL format that includes a context parameter.
+        /// For NEW shorter Teams meeting URLs (introduced with MCnumber rollout), you should:
+        /// 1. Use the Graph API to query the OnlineMeeting by JoinWebUrl to get meeting details
+        /// 2. Use JoinMeetingIdMeetingInfo with the meeting ID and passcode from the API response
+        /// Example: var meeting = await graphClient.Communications.OnlineMeetings.Request().Filter($"JoinWebUrl eq '{encodedUrl}'").GetAsync();
         /// </summary>
         /// <param name="joinURL">Join URL from Team's meeting body.</param>
         /// <returns>Parsed data.</returns>
         public static (ChatInfo, MeetingInfo) ParseJoinURL(string joinURL)
         {
+            if (string.IsNullOrWhiteSpace(joinURL))
+            {
+                throw new ArgumentException($"Join URL cannot be null, empty, or whitespace: {joinURL}", nameof(joinURL));
+            }
+
             var decodedURL = WebUtility.UrlDecode(joinURL);
 
-            //// URL being needs to be in this format.
+            //// Old URL format with context parameter:
             //// https://teams.microsoft.com/l/meetup-join/19:cd9ce3da56624fe69c9d7cd026f9126d@thread.skype/1509579179399?context={"Tid":"72f988bf-86f1-41af-91ab-2d7cd011db47","Oid":"550fae72-d251-43ec-868c-373732c2704f","MessageId":"1536978844957"}
+            //// New shorter URL format (not supported by this parser):
+            //// https://teams.microsoft.com/l/meetup-join/...
 
             var regex = new Regex("https://teams\\.microsoft\\.com.*/(?<thread>[^/]+)/(?<message>[^/]+)\\?context=(?<context>{.*})");
             var match = regex.Match(decodedURL);
             if (!match.Success)
             {
+                // Check if this is a new shorter URL format
+                if (decodedURL.Contains("teams.microsoft.com") && decodedURL.Contains("/meetup-join/") && !decodedURL.Contains("?context="))
+                {
+                    throw new NotSupportedException(
+                        $"This appears to be a new shorter Teams meeting URL format which is not supported by this parser. " +
+                        $"To join meetings with this URL format, please use the Graph API to resolve the meeting details:\n" +
+                        $"1. Query: GET /communications/onlineMeetings?$filter=JoinWebUrl eq '{Uri.EscapeDataString(joinURL)}'\n" +
+                        $"2. Use JoinMeetingIdMeetingInfo with the meeting.JoinMeetingIdSettings from the response.\n" +
+                        $"See: https://learn.microsoft.com/graph/api/resources/joinmeetingidmeetinginfo");
+                }
                 throw new ArgumentException($"Join URL cannot be parsed: {joinURL}.", nameof(joinURL));
             }
 
diff --git a/Samples/Common/Sample.Common.Tests/HeartbeatHandlerTests.cs b/Samples/Common/Sample.Common.Tests/HeartbeatHandlerTests.cs
index cebdb5eb6..126d4dd85 100644
--- a/Samples/Common/Sample.Common.Tests/HeartbeatHandlerTests.cs
+++ b/Samples/Common/Sample.Common.Tests/HeartbeatHandlerTests.cs
@@ -25,7 +25,7 @@ public class HeartbeatHandlerTests
         /// <summary>
         /// Gets or sets the test context.
         /// </summary>
-        public TestContext TestContext
+        public TestContext? TestContext
         {
             get; set;
         }
@@ -73,7 +73,7 @@ public void HeartbeatShouldLogSuccess()
                 onNext: @event =>
                 {
                     Interlocked.Increment(ref loggerCount);
-                    this.TestContext.WriteLine(formatter.Format(@event));
+                    this.TestContext!.WriteLine(formatter.Format(@event));
                 },
                 onError: @exception =>
                 {
@@ -107,7 +107,7 @@ public void HeartbeatShouldLogFailure()
                 onNext: @event =>
                 {
                     Interlocked.Increment(ref errorCount);
-                    this.TestContext.WriteLine(formatter.Format(@event));
+                    this.TestContext!.WriteLine(formatter.Format(@event));
                 },
                 onError: @exception =>
                 {
diff --git a/Samples/Common/Sample.Common.Tests/Meetings/JoinInfoTests.cs b/Samples/Common/Sample.Common.Tests/Meetings/JoinInfoTests.cs
new file mode 100644
index 000000000..378487b73
--- /dev/null
+++ b/Samples/Common/Sample.Common.Tests/Meetings/JoinInfoTests.cs
@@ -0,0 +1,187 @@
+// <copyright file="JoinInfoTests.cs" company="Microsoft Corporation">
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license.
+// </copyright>
+
+namespace Samples.Common.Tests.Meetings
+{
+    using System;
+    using Microsoft.Graph;
+    using Microsoft.VisualStudio.TestTools.UnitTesting;
+    using Sample.Common.Meetings;
+
+    /// <summary>
+    /// Unit tests for JoinInfo URL parsing.
+    /// </summary>
+    [TestClass]
+    public class JoinInfoTests
+    {
+        private const string OldFormatUrl = "https://teams.microsoft.com/l/meetup-join/19:cd9ce3da56624fe69c9d7cd026f9126d@thread.skype/1509579179399?context={\"Tid\":\"72f988bf-86f1-41af-91ab-2d7cd011db47\",\"Oid\":\"550fae72-d251-43ec-868c-373732c2704f\",\"MessageId\":\"1536978844957\"}";
+        private const string OldFormatUrlEncoded = "https://teams.microsoft.com/l/meetup-join/19:cd9ce3da56624fe69c9d7cd026f9126d@thread.skype/1509579179399?context=%7B%22Tid%22%3A%2272f988bf-86f1-41af-91ab-2d7cd011db47%22%2C%22Oid%22%3A%22550fae72-d251-43ec-868c-373732c2704f%22%2C%22MessageId%22%3A%221536978844957%22%7D";
+        private const string NewFormatUrlShort = "https://teams.microsoft.com/l/meetup-join/19:meeting_abc123def456@thread.v2/0";
+        private const string NewFormatUrlWithoutContext = "https://teams.microsoft.com/l/meetup-join/19:meeting_YzY4NDFjZDUtZTdlOC00MDg3LWI3M2QtZTgzYzdiYzM0Yjk5@thread.skype/0";
+
+        /// <summary>
+        /// Gets or sets the test context.
+        /// </summary>
+        public TestContext? TestContext { get; set; }
+
+        /// <summary>
+        /// Test that old format URL with context parameter parses successfully.
+        /// </summary>
+        [TestMethod]
+        public void ParseJoinURL_OldFormatWithContext_ParsesSuccessfully()
+        {
+            // Act
+            var (chatInfo, meetingInfo) = JoinInfo.ParseJoinURL(OldFormatUrl);
+
+            // Assert
+            Assert.IsNotNull(chatInfo);
+            Assert.IsNotNull(meetingInfo);
+            Assert.AreEqual("19:cd9ce3da56624fe69c9d7cd026f9126d@thread.skype", chatInfo.ThreadId);
+            Assert.AreEqual("1509579179399", chatInfo.MessageId);
+            Assert.AreEqual("1536978844957", chatInfo.ReplyChainMessageId);
+
+            Assert.IsInstanceOfType(meetingInfo, typeof(OrganizerMeetingInfo));
+            var organizerInfo = (OrganizerMeetingInfo)meetingInfo;
+            Assert.IsNotNull(organizerInfo.Organizer);
+            Assert.IsNotNull(organizerInfo.Organizer.User);
+            Assert.AreEqual("550fae72-d251-43ec-868c-373732c2704f", organizerInfo.Organizer.User.Id);
+        }
+
+        /// <summary>
+        /// Test that old format URL with encoded context parameter parses successfully.
+        /// </summary>
+        [TestMethod]
+        public void ParseJoinURL_OldFormatUrlEncoded_ParsesSuccessfully()
+        {
+            // Act
+            var (chatInfo, meetingInfo) = JoinInfo.ParseJoinURL(OldFormatUrlEncoded);
+
+            // Assert
+            Assert.IsNotNull(chatInfo);
+            Assert.IsNotNull(meetingInfo);
+            Assert.AreEqual("19:cd9ce3da56624fe69c9d7cd026f9126d@thread.skype", chatInfo.ThreadId);
+            Assert.IsInstanceOfType(meetingInfo, typeof(OrganizerMeetingInfo));
+        }
+
+        /// <summary>
+        /// Test that new shorter URL format throws NotSupportedException.
+        /// </summary>
+        [TestMethod]
+        [ExpectedException(typeof(NotSupportedException))]
+        public void ParseJoinURL_NewShorterFormat_ThrowsNotSupportedException()
+        {
+            // Act
+            JoinInfo.ParseJoinURL(NewFormatUrlShort);
+        }
+
+        /// <summary>
+        /// Test that new URL format without context throws NotSupportedException.
+        /// </summary>
+        [TestMethod]
+        [ExpectedException(typeof(NotSupportedException))]
+        public void ParseJoinURL_NewFormatWithoutContext_ThrowsNotSupportedException()
+        {
+            // Act
+            JoinInfo.ParseJoinURL(NewFormatUrlWithoutContext);
+        }
+
+        /// <summary>
+        /// Test that new format URL exception message contains helpful guidance.
+        /// </summary>
+        [TestMethod]
+        public void ParseJoinURL_NewFormat_ExceptionContainsGuidance()
+        {
+            // Act & Assert
+            var exception = Assert.ThrowsException<NotSupportedException>(() =>
+            {
+                JoinInfo.ParseJoinURL(NewFormatUrlShort);
+            });
+
+            this.TestContext!.WriteLine($"Exception message: {exception.Message}");
+
+            // Verify the exception message contains helpful guidance
+            Assert.IsTrue(exception.Message.Contains("new shorter Teams meeting URL format"));
+            Assert.IsTrue(exception.Message.Contains("Graph API"));
+            Assert.IsTrue(exception.Message.Contains("JoinMeetingIdMeetingInfo"));
+            Assert.IsTrue(exception.Message.Contains("/communications/onlineMeetings"));
+        }
+
+        /// <summary>
+        /// Test that null URL throws ArgumentException.
+        /// </summary>
+        [TestMethod]
+        [ExpectedException(typeof(ArgumentException))]
+        public void ParseJoinURL_NullUrl_ThrowsArgumentException()
+        {
+            // Act
+            JoinInfo.ParseJoinURL(null);
+        }
+
+        /// <summary>
+        /// Test that empty URL throws ArgumentException.
+        /// </summary>
+        [TestMethod]
+        [ExpectedException(typeof(ArgumentException))]
+        public void ParseJoinURL_EmptyUrl_ThrowsArgumentException()
+        {
+            // Act
+            JoinInfo.ParseJoinURL(string.Empty);
+        }
+
+        /// <summary>
+        /// Test that whitespace URL throws ArgumentException.
+        /// </summary>
+        [TestMethod]
+        [ExpectedException(typeof(ArgumentException))]
+        public void ParseJoinURL_WhitespaceUrl_ThrowsArgumentException()
+        {
+            // Act
+            JoinInfo.ParseJoinURL("   ");
+        }
+
+        /// <summary>
+        /// Test that completely invalid URL throws ArgumentException.
+        /// </summary>
+        [TestMethod]
+        [ExpectedException(typeof(ArgumentException))]
+        public void ParseJoinURL_InvalidUrl_ThrowsArgumentException()
+        {
+            // Act
+            JoinInfo.ParseJoinURL("https://example.com/not-a-teams-url");
+        }
+
+        /// <summary>
+        /// Test that malformed Teams URL throws ArgumentException.
+        /// </summary>
+        [TestMethod]
+        [ExpectedException(typeof(ArgumentException))]
+        public void ParseJoinURL_MalformedTeamsUrl_ThrowsArgumentException()
+        {
+            // Act
+            JoinInfo.ParseJoinURL("https://teams.microsoft.com/malformed?context=invalid");
+        }
+
+        /// <summary>
+        /// Test that different thread formats are parsed correctly.
+        /// </summary>
+        [TestMethod]
+        public void ParseJoinURL_DifferentThreadFormats_ParsesCorrectly()
+        {
+            // Arrange
+            var threadSkypeUrl = "https://teams.microsoft.com/l/meetup-join/19:meeting_abc@thread.skype/0?context={\"Tid\":\"72f988bf-86f1-41af-91ab-2d7cd011db47\",\"Oid\":\"550fae72-d251-43ec-868c-373732c2704f\"}";
+            var threadV2Url = "https://teams.microsoft.com/l/meetup-join/19:meeting_abc@thread.v2/0?context={\"Tid\":\"72f988bf-86f1-41af-91ab-2d7cd011db47\",\"Oid\":\"550fae72-d251-43ec-868c-373732c2704f\"}";
+
+            // Act
+            var (chatInfo1, meetingInfo1) = JoinInfo.ParseJoinURL(threadSkypeUrl);
+            var (chatInfo2, meetingInfo2) = JoinInfo.ParseJoinURL(threadV2Url);
+
+            // Assert
+            Assert.AreEqual("19:meeting_abc@thread.skype", chatInfo1.ThreadId);
+            Assert.AreEqual("19:meeting_abc@thread.v2", chatInfo2.ThreadId);
+            Assert.IsNotNull(meetingInfo1);
+            Assert.IsNotNull(meetingInfo2);
+        }
+    }
+}
diff --git a/Samples/Common/Sample.Common.Tests/Sample.Common.Tests.csproj b/Samples/Common/Sample.Common.Tests/Sample.Common.Tests.csproj
index 98c310c5b..ddf18a942 100644
--- a/Samples/Common/Sample.Common.Tests/Sample.Common.Tests.csproj
+++ b/Samples/Common/Sample.Common.Tests/Sample.Common.Tests.csproj
@@ -1,18 +1,18 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.2</TargetFramework>
-
+    <TargetFramework>net6.0</TargetFramework>
     <IsPackable>false</IsPackable>
+    <Nullable>enable</Nullable>
   </PropertyGroup>
 
   <Import Project="$(MSBuildThisFileDirectory)..\..\Graph.props" />
   
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
-    <PackageReference Include="MSTest.TestAdapter" Version="2.0.0" />
-    <PackageReference Include="MSTest.TestFramework" Version="2.0.0" />
-    <PackageReference Include="coverlet.collector" Version="1.0.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
+    <PackageReference Include="MSTest.TestAdapter" Version="3.5.2" />
+    <PackageReference Include="MSTest.TestFramework" Version="3.5.2" />
+    <PackageReference Include="coverlet.collector" Version="6.0.2" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/Samples/Common/Sample.Common.V1/Meetings/JoinInfo.cs b/Samples/Common/Sample.Common.V1/Meetings/JoinInfo.cs
index da5d39316..29947aff8 100644
--- a/Samples/Common/Sample.Common.V1/Meetings/JoinInfo.cs
+++ b/Samples/Common/Sample.Common.V1/Meetings/JoinInfo.cs
@@ -21,20 +21,42 @@ public class JoinInfo
     {
         /// <summary>
         /// Parse Join URL into its components.
+        /// NOTE: This method only works with the OLD Teams meeting URL format that includes a context parameter.
+        /// For NEW shorter Teams meeting URLs (introduced with MCnumber rollout), you should:
+        /// 1. Use the Graph API to query the OnlineMeeting by JoinWebUrl to get meeting details
+        /// 2. Use JoinMeetingIdMeetingInfo with the meeting ID and passcode from the API response
+        /// Example: var meeting = await graphClient.Communications.OnlineMeetings.Request().Filter($"JoinWebUrl eq '{encodedUrl}'").GetAsync();
         /// </summary>
         /// <param name="joinURL">Join URL from Team's meeting body.</param>
         /// <returns>Parsed data.</returns>
         public static (ChatInfo, MeetingInfo) ParseJoinURL(string joinURL)
         {
+            if (string.IsNullOrWhiteSpace(joinURL))
+            {
+                throw new ArgumentException($"Join URL cannot be null, empty, or whitespace: {joinURL}", nameof(joinURL));
+            }
+
             var decodedURL = WebUtility.UrlDecode(joinURL);
 
-            //// URL being needs to be in this format.
+            //// Old URL format with context parameter:
             //// https://teams.microsoft.com/l/meetup-join/19:cd9ce3da56624fe69c9d7cd026f9126d@thread.skype/1509579179399?context={"Tid":"72f988bf-86f1-41af-91ab-2d7cd011db47","Oid":"550fae72-d251-43ec-868c-373732c2704f","MessageId":"1536978844957"}
+            //// New shorter URL format (not supported by this parser):
+            //// https://teams.microsoft.com/l/meetup-join/...
 
             var regex = new Regex("https://teams\\.microsoft\\.com.*/(?<thread>[^/]+)/(?<message>[^/]+)\\?context=(?<context>{.*})");
             var match = regex.Match(decodedURL);
             if (!match.Success)
             {
+                // Check if this is a new shorter URL format
+                if (decodedURL.Contains("teams.microsoft.com") && decodedURL.Contains("/meetup-join/") && !decodedURL.Contains("?context="))
+                {
+                    throw new NotSupportedException(
+                        $"This appears to be a new shorter Teams meeting URL format which is not supported by this parser. " +
+                        $"To join meetings with this URL format, please use the Graph API to resolve the meeting details:\n" +
+                        $"1. Query: GET /communications/onlineMeetings?$filter=JoinWebUrl eq '{Uri.EscapeDataString(joinURL)}'\n" +
+                        $"2. Use JoinMeetingIdMeetingInfo with the meeting.JoinMeetingIdSettings from the response.\n" +
+                        $"See: https://learn.microsoft.com/graph/api/resources/joinmeetingidmeetinginfo");
+                }
                 throw new ArgumentException($"Join URL cannot be parsed: {joinURL}.", nameof(joinURL));
             }
 
diff --git a/Samples/Common/Sample.Common/Meetings/JoinInfo.cs b/Samples/Common/Sample.Common/Meetings/JoinInfo.cs
index c43df2d95..aeaf60e49 100644
--- a/Samples/Common/Sample.Common/Meetings/JoinInfo.cs
+++ b/Samples/Common/Sample.Common/Meetings/JoinInfo.cs
@@ -21,20 +21,43 @@ public class JoinInfo
     {
         /// <summary>
         /// Parse Join URL into its components.
+        /// NOTE: This method only works with the OLD Teams meeting URL format that includes a context parameter.
+        /// For NEW shorter Teams meeting URLs (introduced with MCnumber rollout), you should:
+        /// 1. Use the Graph API to query the OnlineMeeting by JoinWebUrl to get meeting details.
+        /// 2. Use JoinMeetingIdMeetingInfo with the meeting ID and passcode from the API response.
+        /// Example: var meeting = await graphClient.Communications.OnlineMeetings.Request().Filter($"JoinWebUrl eq '{encodedUrl}'").GetAsync().
         /// </summary>
         /// <param name="joinURL">Join URL from Team's meeting body.</param>
         /// <returns>Parsed data.</returns>
         public static (ChatInfo, MeetingInfo) ParseJoinURL(string joinURL)
         {
+            if (string.IsNullOrWhiteSpace(joinURL))
+            {
+                throw new ArgumentException($"Join URL cannot be null, empty, or whitespace: {joinURL}", nameof(joinURL));
+            }
+
             var decodedURL = WebUtility.UrlDecode(joinURL);
 
-            //// URL being needs to be in this format.
+            //// Old URL format with context parameter:
             //// https://teams.microsoft.com/l/meetup-join/19:cd9ce3da56624fe69c9d7cd026f9126d@thread.skype/1509579179399?context={"Tid":"72f988bf-86f1-41af-91ab-2d7cd011db47","Oid":"550fae72-d251-43ec-868c-373732c2704f","MessageId":"1536978844957"}
+            //// New shorter URL format (not supported by this parser):
+            //// https://teams.microsoft.com/l/meetup-join/...
 
             var regex = new Regex("https://teams\\.microsoft\\.com.*/(?<thread>[^/]+)/(?<message>[^/]+)\\?context=(?<context>{.*})");
             var match = regex.Match(decodedURL);
             if (!match.Success)
             {
+                // Check if this is a new shorter URL format
+                if (decodedURL.Contains("teams.microsoft.com") && decodedURL.Contains("/meetup-join/") && !decodedURL.Contains("?context="))
+                {
+                    throw new NotSupportedException(
+                        $"This appears to be a new shorter Teams meeting URL format which is not supported by this parser. " +
+                        $"To join meetings with this URL format, please use the Graph API to resolve the meeting details:\n" +
+                        $"1. Query: GET /communications/onlineMeetings?$filter=JoinWebUrl eq '{Uri.EscapeDataString(joinURL)}'\n" +
+                        $"2. Use JoinMeetingIdMeetingInfo with the meeting.JoinMeetingIdSettings from the response.\n" +
+                        $"See: https://learn.microsoft.com/graph/api/resources/joinmeetingidmeetinginfo");
+                }
+
                 throw new ArgumentException($"Join URL cannot be parsed: {joinURL}.", nameof(joinURL));
             }
 
diff --git a/Samples/PublicSamples/EchoBot/src/EchoBot/Models/JoinInfo.cs b/Samples/PublicSamples/EchoBot/src/EchoBot/Models/JoinInfo.cs
index c4e6da7d2..02a56b42c 100644
--- a/Samples/PublicSamples/EchoBot/src/EchoBot/Models/JoinInfo.cs
+++ b/Samples/PublicSamples/EchoBot/src/EchoBot/Models/JoinInfo.cs
@@ -28,25 +28,46 @@ public class JoinInfo
     {
         /// <summary>
         /// Parse Join URL into its components.
+        /// NOTE: This method only works with the OLD Teams meeting URL format that includes a context parameter.
+        /// For NEW shorter Teams meeting URLs (introduced with MCnumber rollout), you should:
+        /// 1. Use the Graph API to query the OnlineMeeting by JoinWebUrl to get meeting details
+        /// 2. Use JoinMeetingIdMeetingInfo with the meeting ID and passcode from the API response
+        /// Example: var meeting = await graphClient.Communications.OnlineMeetings.Request().Filter($"JoinWebUrl eq '{encodedUrl}'").GetAsync();
         /// </summary>
         /// <param name="joinURL">Join URL from Team's meeting body.</param>
         /// <returns>Parsed data.</returns>
         /// <exception cref="ArgumentException">Join URL cannot be null or empty: {joinURL} - joinURL</exception>
         /// <exception cref="ArgumentException">Join URL cannot be parsed: {joinURL} - joinURL</exception>
+        /// <exception cref="NotSupportedException">Join URL is in new shorter format - use Graph API</exception>
         /// <exception cref="ArgumentException">Join URL is invalid: missing Tid - joinURL</exception>
         public static (ChatInfo, MeetingInfo) ParseJoinURL(string joinURL)
         {
-            if (string.IsNullOrEmpty(joinURL))
+            if (string.IsNullOrWhiteSpace(joinURL))
             {
-                throw new ArgumentException($"Join URL cannot be null or empty: {joinURL}", nameof(joinURL));
+                throw new ArgumentException($"Join URL cannot be null, empty, or whitespace: {joinURL}", nameof(joinURL));
             }
 
             var decodedURL = WebUtility.UrlDecode(joinURL);
 
+            //// Old URL format with context parameter:
+            //// https://teams.microsoft.com/l/meetup-join/19:cd9ce3da56624fe69c9d7cd026f9126d@thread.skype/1509579179399?context={"Tid":"72f988bf-86f1-41af-91ab-2d7cd011db47","Oid":"550fae72-d251-43ec-868c-373732c2704f","MessageId":"1536978844957"}
+            //// New shorter URL format (not supported by this parser):
+            //// https://teams.microsoft.com/l/meetup-join/...
+
             var regex = new Regex("https://teams\\.microsoft\\.com.*/(?<thread>[^/]+)/(?<message>[^/]+)\\?context=(?<context>{.*})");
             var match = regex.Match(decodedURL);
             if (!match.Success)
             {
+                // Check if this is a new shorter URL format
+                if (decodedURL.Contains("teams.microsoft.com") && decodedURL.Contains("/meetup-join/") && !decodedURL.Contains("?context="))
+                {
+                    throw new NotSupportedException(
+                        $"This appears to be a new shorter Teams meeting URL format which is not supported by this parser. " +
+                        $"To join meetings with this URL format, please use the Graph API to resolve the meeting details:\n" +
+                        $"1. Query: GET /communications/onlineMeetings?$filter=JoinWebUrl eq '{Uri.EscapeDataString(joinURL)}'\n" +
+                        $"2. Use JoinMeetingIdMeetingInfo with the meeting.JoinMeetingIdSettings from the response.\n" +
+                        $"See: https://learn.microsoft.com/graph/api/resources/joinmeetingidmeetinginfo");
+                }
                 throw new ArgumentException($"Join URL cannot be parsed: {joinURL}", nameof(joinURL));
             }
 
diff --git a/Samples/V1.0Samples/AksSamples(Deprecated)/teams-recording-bot/src/RecordingBot.Services/Util/JoinInfo.cs b/Samples/V1.0Samples/AksSamples(Deprecated)/teams-recording-bot/src/RecordingBot.Services/Util/JoinInfo.cs
index 37e776f80..a1042b3ee 100644
--- a/Samples/V1.0Samples/AksSamples(Deprecated)/teams-recording-bot/src/RecordingBot.Services/Util/JoinInfo.cs
+++ b/Samples/V1.0Samples/AksSamples(Deprecated)/teams-recording-bot/src/RecordingBot.Services/Util/JoinInfo.cs
@@ -29,28 +29,46 @@ public class JoinInfo
     {
         /// <summary>
         /// Parse Join URL into its components.
+        /// NOTE: This method only works with the OLD Teams meeting URL format that includes a context parameter.
+        /// For NEW shorter Teams meeting URLs (introduced with MCnumber rollout), you should:
+        /// 1. Use the Graph API to query the OnlineMeeting by JoinWebUrl to get meeting details
+        /// 2. Use JoinMeetingIdMeetingInfo with the meeting ID and passcode from the API response
+        /// Example: var meeting = await graphClient.Communications.OnlineMeetings.Request().Filter($"JoinWebUrl eq '{encodedUrl}'").GetAsync();
         /// </summary>
         /// <param name="joinURL">Join URL from Team's meeting body.</param>
         /// <returns>Parsed data.</returns>
         /// <exception cref="ArgumentException">Join URL cannot be null or empty: {joinURL} - joinURL</exception>
         /// <exception cref="ArgumentException">Join URL cannot be parsed: {joinURL} - joinURL</exception>
+        /// <exception cref="NotSupportedException">Join URL is in new shorter format - use Graph API</exception>
         /// <exception cref="ArgumentException">Join URL is invalid: missing Tid - joinURL</exception>
         public static (ChatInfo, MeetingInfo) ParseJoinURL(string joinURL)
         {
-            if (string.IsNullOrEmpty(joinURL))
+            if (string.IsNullOrWhiteSpace(joinURL))
             {
-                throw new ArgumentException($"Join URL cannot be null or empty: {joinURL}", nameof(joinURL));
+                throw new ArgumentException($"Join URL cannot be null, empty, or whitespace: {joinURL}", nameof(joinURL));
             }
 
             var decodedURL = WebUtility.UrlDecode(joinURL);
 
-            //// URL being needs to be in this format.
+            //// Old URL format with context parameter:
             //// https://teams.microsoft.com/l/meetup-join/19:cd9ce3da56624fe69c9d7cd026f9126d@thread.skype/1509579179399?context={"Tid":"72f988bf-86f1-41af-91ab-2d7cd011db47","Oid":"550fae72-d251-43ec-868c-373732c2704f","MessageId":"1536978844957"}
+            //// New shorter URL format (not supported by this parser):
+            //// https://teams.microsoft.com/l/meetup-join/...
 
             var regex = new Regex("https://teams\\.microsoft\\.com.*/(?<thread>[^/]+)/(?<message>[^/]+)\\?context=(?<context>{.*})");
             var match = regex.Match(decodedURL);
             if (!match.Success)
             {
+                // Check if this is a new shorter URL format
+                if (decodedURL.Contains("teams.microsoft.com") && decodedURL.Contains("/meetup-join/") && !decodedURL.Contains("?context="))
+                {
+                    throw new NotSupportedException(
+                        $"This appears to be a new shorter Teams meeting URL format which is not supported by this parser. " +
+                        $"To join meetings with this URL format, please use the Graph API to resolve the meeting details:\n" +
+                        $"1. Query: GET /communications/onlineMeetings?$filter=JoinWebUrl eq '{Uri.EscapeDataString(joinURL)}'\n" +
+                        $"2. Use JoinMeetingIdMeetingInfo with the meeting.JoinMeetingIdSettings from the response.\n" +
+                        $"See: https://learn.microsoft.com/graph/api/resources/joinmeetingidmeetinginfo");
+                }
                 throw new ArgumentException($"Join URL cannot be parsed: {joinURL}", nameof(joinURL));
             }
 
diff --git a/Samples/V1.0Samples/LocalMediaSamples/HueBot/HueBot/HueBot.csproj b/Samples/V1.0Samples/LocalMediaSamples/HueBot/HueBot/HueBot.csproj
index e5afb0cfc..a08cd5953 100644
--- a/Samples/V1.0Samples/LocalMediaSamples/HueBot/HueBot/HueBot.csproj
+++ b/Samples/V1.0Samples/LocalMediaSamples/HueBot/HueBot/HueBot.csproj
@@ -13,9 +13,9 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore" Version="2.1.3" />
-    <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="2.1.2" />
+    <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="2.1.30" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="2.1.2" />
-    <PackageReference Include="Microsoft.AspNetCore.Server.HttpSys" Version="2.1.1" />
+    <PackageReference Include="Microsoft.AspNetCore.Server.HttpSys" Version="2.1.12" />
     <PackageReference Include="Microsoft.ServiceFabric.AspNetCore.HttpSys" Version="3.2.176" />
     <!-- Although Bots.Media is implicitly imported by Calls.Media, this library requires an explicit reference for
     some scripts included within the nuget package. -->