diff --git a/Assets/Scripts/ConnectionManagement/ConnectionManager.cs b/Assets/Scripts/ConnectionManagement/ConnectionManager.cs
index d1e98e7b0..813618b54 100644
--- a/Assets/Scripts/ConnectionManagement/ConnectionManager.cs
+++ b/Assets/Scripts/ConnectionManagement/ConnectionManager.cs
@@ -93,8 +93,7 @@ void Start()
 
             m_CurrentState = m_Offline;
 
-            NetworkManager.OnClientConnectedCallback += OnClientConnectedCallback;
-            NetworkManager.OnClientDisconnectCallback += OnClientDisconnectCallback;
+            NetworkManager.OnConnectionEvent += OnConnectionEvent;
             NetworkManager.OnServerStarted += OnServerStarted;
             NetworkManager.ConnectionApprovalCallback += ApprovalCheck;
             NetworkManager.OnTransportFailure += OnTransportFailure;
@@ -103,8 +102,7 @@ void Start()
 
         void OnDestroy()
         {
-            NetworkManager.OnClientConnectedCallback -= OnClientConnectedCallback;
-            NetworkManager.OnClientDisconnectCallback -= OnClientDisconnectCallback;
+            NetworkManager.OnConnectionEvent -= OnConnectionEvent;
             NetworkManager.OnServerStarted -= OnServerStarted;
             NetworkManager.ConnectionApprovalCallback -= ApprovalCheck;
             NetworkManager.OnTransportFailure -= OnTransportFailure;
@@ -123,14 +121,17 @@ internal void ChangeState(ConnectionState nextState)
             m_CurrentState.Enter();
         }
 
-        void OnClientDisconnectCallback(ulong clientId)
+        void OnConnectionEvent(NetworkManager networkManager, ConnectionEventData connectionEventData)
         {
-            m_CurrentState.OnClientDisconnect(clientId);
-        }
-
-        void OnClientConnectedCallback(ulong clientId)
-        {
-            m_CurrentState.OnClientConnected(clientId);
+            switch (connectionEventData.EventType)
+            {
+                case ConnectionEvent.ClientConnected:
+                    m_CurrentState.OnClientConnected(connectionEventData.ClientId);
+                    break;
+                case ConnectionEvent.ClientDisconnected:
+                    m_CurrentState.OnClientDisconnect(connectionEventData.ClientId);
+                    break;
+            }
         }
 
         void OnServerStarted()
diff --git a/Assets/Scripts/Gameplay/GameState/ServerBossRoomState.cs b/Assets/Scripts/Gameplay/GameState/ServerBossRoomState.cs
index 3eb16ad6d..ca0610fd1 100644
--- a/Assets/Scripts/Gameplay/GameState/ServerBossRoomState.cs
+++ b/Assets/Scripts/Gameplay/GameState/ServerBossRoomState.cs
@@ -79,7 +79,7 @@ void OnNetworkSpawn()
             m_PersistentGameState.Reset();
             m_LifeStateChangedEventMessageSubscriber.Subscribe(OnLifeStateChangedEventMessage);
 
-            NetworkManager.Singleton.OnClientDisconnectCallback += OnClientDisconnect;
+            NetworkManager.Singleton.OnConnectionEvent += OnConnectionEvent;
             NetworkManager.Singleton.SceneManager.OnLoadEventCompleted += OnLoadEventCompleted;
             NetworkManager.Singleton.SceneManager.OnSynchronizeComplete += OnSynchronizeComplete;
 
@@ -93,7 +93,7 @@ void OnNetworkDespawn()
                 m_LifeStateChangedEventMessageSubscriber.Unsubscribe(OnLifeStateChangedEventMessage);
             }
 
-            NetworkManager.Singleton.OnClientDisconnectCallback -= OnClientDisconnect;
+            NetworkManager.Singleton.OnConnectionEvent -= OnConnectionEvent;
             NetworkManager.Singleton.SceneManager.OnLoadEventCompleted -= OnLoadEventCompleted;
             NetworkManager.Singleton.SceneManager.OnSynchronizeComplete -= OnSynchronizeComplete;
         }
@@ -138,12 +138,15 @@ void OnLoadEventCompleted(string sceneName, LoadSceneMode loadSceneMode, List<ul
             }
         }
 
-        void OnClientDisconnect(ulong clientId)
+        void OnConnectionEvent(NetworkManager networkManager, ConnectionEventData connectionEventData)
         {
-            if (clientId != NetworkManager.Singleton.LocalClientId)
+            if (connectionEventData.EventType == ConnectionEvent.ClientDisconnected)
             {
-                // If a client disconnects, check for game over in case all other players are already down
-                StartCoroutine(WaitToCheckForGameOver());
+                if (connectionEventData.ClientId != networkManager.LocalClientId)
+                {
+                    // If a client disconnects, check for game over in case all other players are already down
+                    StartCoroutine(WaitToCheckForGameOver());
+                }
             }
         }
 
diff --git a/Assets/Scripts/Gameplay/GameState/ServerCharSelectState.cs b/Assets/Scripts/Gameplay/GameState/ServerCharSelectState.cs
index 3bdbc56f8..02e8e9d5b 100644
--- a/Assets/Scripts/Gameplay/GameState/ServerCharSelectState.cs
+++ b/Assets/Scripts/Gameplay/GameState/ServerCharSelectState.cs
@@ -184,11 +184,11 @@ IEnumerator WaitToEndSession()
             SceneLoaderWrapper.Instance.LoadScene("BossRoom", useNetworkSceneManager: true);
         }
 
-        public void OnNetworkDespawn()
+        void OnNetworkDespawn()
         {
             if (NetworkManager.Singleton)
             {
-                NetworkManager.Singleton.OnClientDisconnectCallback -= OnClientDisconnectCallback;
+                NetworkManager.Singleton.OnConnectionEvent -= OnConnectionEvent;
                 NetworkManager.Singleton.SceneManager.OnSceneEvent -= OnSceneEvent;
             }
             if (networkCharSelection)
@@ -197,7 +197,7 @@ public void OnNetworkDespawn()
             }
         }
 
-        public void OnNetworkSpawn()
+        void OnNetworkSpawn()
         {
             if (!NetworkManager.Singleton.IsServer)
             {
@@ -205,7 +205,7 @@ public void OnNetworkSpawn()
             }
             else
             {
-                NetworkManager.Singleton.OnClientDisconnectCallback += OnClientDisconnectCallback;
+                NetworkManager.Singleton.OnConnectionEvent += OnConnectionEvent;
                 networkCharSelection.OnClientChangedSeat += OnClientChangedSeat;
 
                 NetworkManager.Singleton.SceneManager.OnSceneEvent += OnSceneEvent;
@@ -276,22 +276,25 @@ void SeatNewPlayer(ulong clientId)
             }
         }
 
-        void OnClientDisconnectCallback(ulong clientId)
+        void OnConnectionEvent(NetworkManager networkManager, ConnectionEventData connectionEventData)
         {
-            // clear this client's PlayerNumber and any associated visuals (so other players know they're gone).
-            for (int i = 0; i < networkCharSelection.sessionPlayers.Count; ++i)
+            if (connectionEventData.EventType == ConnectionEvent.ClientDisconnected)
             {
-                if (networkCharSelection.sessionPlayers[i].ClientId == clientId)
+                // clear this client's PlayerNumber and any associated visuals (so other players know they're gone).
+                for (int i = 0; i < networkCharSelection.sessionPlayers.Count; ++i)
                 {
-                    networkCharSelection.sessionPlayers.RemoveAt(i);
-                    break;
+                    if (networkCharSelection.sessionPlayers[i].ClientId == connectionEventData.ClientId)
+                    {
+                        networkCharSelection.sessionPlayers.RemoveAt(i);
+                        break;
+                    }
                 }
-            }
 
-            if (!networkCharSelection.IsSessionClosed.Value)
-            {
-                // If the Session is not already closing, close if the remaining players are all ready
-                CloseSessionIfReady();
+                if (!networkCharSelection.IsSessionClosed.Value)
+                {
+                    // If the Session is not already closing, close if the remaining players are all ready
+                    CloseSessionIfReady();
+                }
             }
         }
     }
diff --git a/Assets/Scripts/Infrastructure/PubSub/NetworkedMessageChannel.cs b/Assets/Scripts/Infrastructure/PubSub/NetworkedMessageChannel.cs
index 3ca9adfd5..8616448cb 100644
--- a/Assets/Scripts/Infrastructure/PubSub/NetworkedMessageChannel.cs
+++ b/Assets/Scripts/Infrastructure/PubSub/NetworkedMessageChannel.cs
@@ -26,7 +26,7 @@ public NetworkedMessageChannel()
         void InjectDependencies(NetworkManager networkManager)
         {
             m_NetworkManager = networkManager;
-            m_NetworkManager.OnClientConnectedCallback += OnClientConnected;
+            m_NetworkManager.OnConnectionEvent += OnConnectionEvent;
             if (m_NetworkManager.IsListening)
             {
                 RegisterHandler();
@@ -40,14 +40,18 @@ public override void Dispose()
                 if (m_NetworkManager != null && m_NetworkManager.CustomMessagingManager != null)
                 {
                     m_NetworkManager.CustomMessagingManager.UnregisterNamedMessageHandler(m_Name);
+                    m_NetworkManager.OnConnectionEvent -= OnConnectionEvent;
                 }
             }
             base.Dispose();
         }
 
-        void OnClientConnected(ulong clientId)
+        void OnConnectionEvent(NetworkManager networkManager, ConnectionEventData connectionEventData)
         {
-            RegisterHandler();
+            if (connectionEventData.EventType == ConnectionEvent.ClientConnected)
+            {
+                RegisterHandler();
+            }
         }
 
         void RegisterHandler()
diff --git a/CHANGELOG.md b/CHANGELOG.md
index ff7e8667d..0daafe68e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -26,26 +26,27 @@ Additional documentation and release notes are available at [Multiplayer Documen
 * VContainer package upgraded from v1.11.0 to v1.14.0 (#896) This upgrade removes warning messages related to IL weaving as code gen is refactored in v1.14.0
 * Upgraded the project to the New Input System v1.11.2 (#897) Compatibility mode with the previous version has been disabled.
 * Upgraded editor version to 6000.0.42f1 and upgraded packages (#901):
- * com.unity.ai.navigation from v2.0.5 to v2.0.6
- * com.unity.collab-proxy from v2.6.0 to v2.7.1
- * com.unity.inputsystem from v1.11.2 to v1.13.1
- * com.unity.learn.iet-framework from v4.0.3 to v4.0.4
- * com.unity.memoryprofiler from v1.1.3 to v1.1.5
- * com.unity.netcode.gameobjects from v2.1.1 to v2.2.0
- * com.unity.render-pipelines-universal from v17.0.3 to v17.0.4
- * com.unity.services.multiplayer from v1.1.0 to v1.1.1
- * com.unity.test-framework from v1.4.5 to v1.4.6
+  * com.unity.ai.navigation from v2.0.5 to v2.0.6
+  * com.unity.collab-proxy from v2.6.0 to v2.7.1
+  * com.unity.inputsystem from v1.11.2 to v1.13.1
+  * com.unity.learn.iet-framework from v4.0.3 to v4.0.4
+  * com.unity.memoryprofiler from v1.1.3 to v1.1.5
+  * com.unity.netcode.gameobjects from v2.1.1 to v2.2.0
+  * com.unity.render-pipelines-universal from v17.0.3 to v17.0.4
+  * com.unity.services.multiplayer from v1.1.0 to v1.1.1
+  * com.unity.test-framework from v1.4.5 to v1.4.6
 * Upgraded editor version to 6000.0.44f1 and upgraded packages (#902):
- * com.unity.ide.rider from v3.0.34 to v3.0.35
- * com.unity.services.multiplayer from v1.1.1 to v1.1.2
- * com.unity.test-framework from v1.4.6 to v1.5.1
- * com.unity.transport from v2.4.0 to v2.5.0
- * com.unity.cinemachine from v.3.1.2 to 3.1.3
- * com.unity.services.authentication from 3.4.0 to 3.4.1
- * jp.hadashikick.vcontainer from 1.14.0 to 1.16.8
- * com.unity.memoryprofiler from 1.1.5 to 1.1.6
- * com.unity.timeline from 1.8.7 to 1.8.8
+  * com.unity.ide.rider from v3.0.34 to v3.0.35
+  * com.unity.services.multiplayer from v1.1.1 to v1.1.2
+  * com.unity.test-framework from v1.4.6 to v1.5.1
+  * com.unity.transport from v2.4.0 to v2.5.0
+  * com.unity.cinemachine from v.3.1.2 to 3.1.3
+  * com.unity.services.authentication from 3.4.0 to 3.4.1
+  * jp.hadashikick.vcontainer from 1.14.0 to 1.16.8
+  * com.unity.memoryprofiler from 1.1.5 to 1.1.6
+  * com.unity.timeline from 1.8.7 to 1.8.8
 * Upgraded Unity Transport package to 2.5.1 (#906)
+* Upgraded the project to use Netcode for GameObject's recommended OnConnectionEvent callback (#907)
 
 ### Cleanup
 * Removed ParrelSync from the project (#890)
@@ -61,6 +62,7 @@ Additional documentation and release notes are available at [Multiplayer Documen
 * Fixed a visual issue where a selected party member's party HUD slot would be displayed as selected (green) when the same or new party member joins the session in-game (#899)
 * Fixed Render Graph API compatibility mode warning and switched active input handling settings to "both" for removing InvalidOperationException (#901) 
 * Fixed error logged when unsubscribing from Session events when removed from a Session (#905)
+* Fixed error logged when attempting to despawn an already despawned LoadingProgressTracker NetworkObject (#907)
 
 ## [2.5.0] - 2024-04-18
 
diff --git a/Packages/com.unity.multiplayer.samples.coop/CHANGELOG.md b/Packages/com.unity.multiplayer.samples.coop/CHANGELOG.md
index da271bfa0..f596dbadf 100644
--- a/Packages/com.unity.multiplayer.samples.coop/CHANGELOG.md
+++ b/Packages/com.unity.multiplayer.samples.coop/CHANGELOG.md
@@ -4,12 +4,13 @@
 
 ### Changed
 * Replaced Lobby and Relay standalone packages with the Multiplayer Services package v1.0.2 (#892)
-* Removed UnityRelayUtilities
+  * Removed UnityRelayUtilities
 * Upgrading Editor version dependency to 6000.0 (#902)
 Upgrading package dependencies:
- *   Tutorial Framework upgraded to  v4.0.4
- *   Multiplayer Tools to v2.2.3
- *   Netcode for GameObjects to v2.2.0 
+  * Tutorial Framework upgraded to  v4.0.4
+  * Multiplayer Tools to v2.2.3
+  * Netcode for GameObjects to v2.2.0
+* Upgraded Utilities package to use Netcode for GameObject's recommended OnConnectionEvent callback (#907)
 
 ## [1.9.0] - 2024-04-18
 
diff --git a/Packages/com.unity.multiplayer.samples.coop/Utilities/SceneManagement/LoadingProgressManager.cs b/Packages/com.unity.multiplayer.samples.coop/Utilities/SceneManagement/LoadingProgressManager.cs
index 9764bb160..459b33b21 100644
--- a/Packages/com.unity.multiplayer.samples.coop/Utilities/SceneManagement/LoadingProgressManager.cs
+++ b/Packages/com.unity.multiplayer.samples.coop/Utilities/SceneManagement/LoadingProgressManager.cs
@@ -50,8 +50,7 @@ public AsyncOperation LocalLoadOperation
         /// </summary>
         public float LocalProgress
         {
-            get => IsSpawned && ProgressTrackers.ContainsKey(NetworkManager.LocalClientId) ?
-                ProgressTrackers[NetworkManager.LocalClientId].Progress.Value : m_LocalProgress;
+            get => IsSpawned && ProgressTrackers.ContainsKey(NetworkManager.LocalClientId) ? ProgressTrackers[NetworkManager.LocalClientId].Progress.Value : m_LocalProgress;
             private set
             {
                 if (IsSpawned && ProgressTrackers.ContainsKey(NetworkManager.LocalClientId) && ProgressTrackers[NetworkManager.LocalClientId].IsSpawned)
@@ -69,18 +68,17 @@ public override void OnNetworkSpawn()
         {
             if (IsServer)
             {
-                NetworkManager.OnClientConnectedCallback += AddTracker;
-                NetworkManager.OnClientDisconnectCallback += RemoveTracker;
-                AddTracker(NetworkManager.LocalClientId);
+                NetworkManager.OnConnectionEvent += OnConnectionEvent;
             }
         }
+
         public override void OnNetworkDespawn()
         {
             if (IsServer)
             {
-                NetworkManager.OnClientConnectedCallback -= AddTracker;
-                NetworkManager.OnClientDisconnectCallback -= RemoveTracker;
+                NetworkManager.OnConnectionEvent -= OnConnectionEvent;
             }
+
             ProgressTrackers.Clear();
             onTrackersUpdated?.Invoke();
         }
@@ -120,9 +118,30 @@ void ClientUpdateTrackersRpc()
                     }
                 }
             }
+
             onTrackersUpdated?.Invoke();
         }
 
+        void OnConnectionEvent(NetworkManager networkManager, ConnectionEventData connectionEventData)
+        {
+            if (IsServer)
+            {
+                switch (connectionEventData.EventType)
+                {
+                    case ConnectionEvent.ClientConnected:
+                    {
+                        AddTracker(connectionEventData.ClientId);
+                        break;
+                    }
+                    case ConnectionEvent.ClientDisconnected:
+                    {
+                        RemoveTracker(connectionEventData.ClientId);
+                        break;
+                    }
+                }
+            }
+        }
+
         void AddTracker(ulong clientId)
         {
             if (IsServer)
@@ -141,9 +160,7 @@ void RemoveTracker(ulong clientId)
             {
                 if (ProgressTrackers.ContainsKey(clientId))
                 {
-                    var tracker = ProgressTrackers[clientId];
                     ProgressTrackers.Remove(clientId);
-                    tracker.NetworkObject.Despawn();
                     ClientUpdateTrackersRpc();
                 }
             }
diff --git a/Packages/com.unity.multiplayer.samples.coop/Utilities/SceneManagement/ServerAdditiveSceneLoader.cs b/Packages/com.unity.multiplayer.samples.coop/Utilities/SceneManagement/ServerAdditiveSceneLoader.cs
index b955b13eb..13559c884 100644
--- a/Packages/com.unity.multiplayer.samples.coop/Utilities/SceneManagement/ServerAdditiveSceneLoader.cs
+++ b/Packages/com.unity.multiplayer.samples.coop/Utilities/SceneManagement/ServerAdditiveSceneLoader.cs
@@ -54,7 +54,7 @@ public override void OnNetworkSpawn()
             {
                 // Adding this to remove all pending references to a specific client when they disconnect, since objects
                 // that are destroyed do not generate OnTriggerExit events.
-                NetworkManager.OnClientDisconnectCallback += RemovePlayer;
+                NetworkManager.OnConnectionEvent += OnConnectionEvent;
 
                 NetworkManager.SceneManager.OnSceneEvent += OnSceneEvent;
                 m_PlayersInTrigger = new List<ulong>();
@@ -65,7 +65,7 @@ public override void OnNetworkDespawn()
         {
             if (IsServer)
             {
-                NetworkManager.OnClientDisconnectCallback -= RemovePlayer;
+                NetworkManager.OnConnectionEvent -= OnConnectionEvent;
                 NetworkManager.SceneManager.OnSceneEvent -= OnSceneEvent;
             }
         }
@@ -136,11 +136,14 @@ void FixedUpdate()
             }
         }
 
-        void RemovePlayer(ulong clientId)
+        void OnConnectionEvent(NetworkManager networkManager, ConnectionEventData connectionEventData)
         {
-            // remove all references to this clientId. There could be multiple references if a single client owns
-            // multiple NetworkObjects with the m_PlayerTag, or if this script's GameObject has overlapping colliders
-            while (m_PlayersInTrigger.Remove(clientId)) { }
+            if (connectionEventData.EventType == ConnectionEvent.ClientDisconnected)
+            {
+                // remove all references to this clientId. There could be multiple references if a single client owns
+                // multiple NetworkObjects with the m_PlayerTag, or if this script's GameObject has overlapping colliders
+                while (m_PlayersInTrigger.Remove(connectionEventData.ClientId)) { }
+            }
         }
 
         IEnumerator WaitToUnloadCoroutine()