diff --git a/src/main/java/envoy/server/Startup.java b/src/main/java/envoy/server/Startup.java
index 3aaaf64..8991667 100755
--- a/src/main/java/envoy/server/Startup.java
+++ b/src/main/java/envoy/server/Startup.java
@@ -18,6 +18,7 @@ import envoy.server.processors.ContactOperationProcessor;
 import envoy.server.processors.ContactSearchProcessor;
 import envoy.server.processors.GroupCreationProcessor;
 import envoy.server.processors.GroupMessageProcessor;
+import envoy.server.processors.GroupMessageStatusChangeProcessor;
 import envoy.server.processors.IDGeneratorRequestProcessor;
 import envoy.server.processors.LoginCredentialProcessor;
 import envoy.server.processors.MessageProcessor;
@@ -72,6 +73,7 @@ public class Startup {
 						new GroupMessageProcessor(),
 						new GroupCreationProcessor(),
 						new MessageStatusChangeProcessor(),
+						new GroupMessageStatusChangeProcessor(),
 						new UserStatusChangeProcessor(),
 						new IDGeneratorRequestProcessor(),
 						new ContactSearchProcessor(),
diff --git a/src/main/java/envoy/server/processors/GroupMessageStatusChangeProcessor.java b/src/main/java/envoy/server/processors/GroupMessageStatusChangeProcessor.java
new file mode 100644
index 0000000..1dc37eb
--- /dev/null
+++ b/src/main/java/envoy/server/processors/GroupMessageStatusChangeProcessor.java
@@ -0,0 +1,69 @@
+package envoy.server.processors;
+
+import java.io.IOException;
+
+import envoy.data.Message.MessageStatus;
+import envoy.event.GroupMessageStatusChange;
+import envoy.event.MessageStatusChange;
+import envoy.exception.EnvoyException;
+import envoy.server.data.GroupMessage;
+import envoy.server.data.PersistenceManager;
+import envoy.server.net.ConnectionManager;
+import envoy.server.net.ObjectWriteProxy;
+
+/**
+ * Project: <strong>envoy-server-standalone</strong><br>
+ * File: <strong>GroupMessageStatusChangeProcessor.java</strong><br>
+ * Created: <strong>03.07.2020</strong><br>
+ * 
+ * @author Maximilian K&auml;fer
+ * @since Envoy Server Standalone v0.1-beta
+ */
+public class GroupMessageStatusChangeProcessor implements ObjectProcessor<GroupMessageStatusChange> {
+
+	private final PersistenceManager	persistenceManager	= PersistenceManager.getInstance();
+	private final ConnectionManager		connectionManager	= ConnectionManager.getInstance();
+
+	@Override
+	public void process(GroupMessageStatusChange input, long socketID, ObjectWriteProxy writeProxy) throws IOException {
+		GroupMessage gmsg = (GroupMessage) persistenceManager.getMessageByID(input.getID());
+		if (gmsg.getStatus() == input.get())
+			throw new IOException(new EnvoyException("The groupMessage already has the status " + input.get()));
+
+		gmsg.getMemberMessageStatus().replace(input.getMemberID(), input.get());
+		
+		// Notifying the other members about memberStatusChange
+		gmsg.getMemberMessageStatus().keySet().stream().filter(k -> connectionManager.getUserIdBySocketID(socketID) != k).forEach(k -> {
+			if(connectionManager.isOnline(k)) {
+				try {
+					writeProxy.write(connectionManager.getSocketID(k), input);
+				} catch (IOException e) {
+					// TODO Maybe Try Catch block is not necessarily needed but if so write proper
+					// logger statement here.
+					e.printStackTrace();
+				}
+			}
+		});
+		
+		if (!gmsg.getMemberMessageStatus().containsValue(MessageStatus.SENT)
+				&& !gmsg.getMemberMessageStatus().containsValue(MessageStatus.RECEIVED)) {
+			gmsg.read();
+			// Notifying the other members about messageStatusChange
+			gmsg.getMemberMessageStatus().keySet().forEach(k -> {
+				if (connectionManager.isOnline(k)) {
+					try {
+						writeProxy.write(connectionManager.getSocketID(k), new MessageStatusChange(input.getID(), input.get(), input.getDate()));
+					} catch (IOException e) {
+						// TODO Maybe Try Catch block is not necessarily needed but if so write proper
+						// logger statement here.
+						e.printStackTrace();
+					}
+				}
+			});
+		}
+		persistenceManager.updateMessage(gmsg);
+	}
+
+	@Override
+	public Class<GroupMessageStatusChange> getInputClass() { return GroupMessageStatusChange.class; }
+}
diff --git a/src/main/java/envoy/server/processors/MessageStatusChangeProcessor.java b/src/main/java/envoy/server/processors/MessageStatusChangeProcessor.java
index 8801d54..f4e2312 100755
--- a/src/main/java/envoy/server/processors/MessageStatusChangeProcessor.java
+++ b/src/main/java/envoy/server/processors/MessageStatusChangeProcessor.java
@@ -3,6 +3,7 @@ package envoy.server.processors;
 import java.io.IOException;
 
 import envoy.data.Message.MessageStatus;
+import envoy.event.GroupMessageStatusChange;
 import envoy.event.MessageStatusChange;
 import envoy.exception.EnvoyException;
 import envoy.server.data.PersistenceManager;
@@ -24,6 +25,8 @@ public class MessageStatusChangeProcessor implements ObjectProcessor<MessageStat
 
 	@Override
 	public void process(MessageStatusChange statusChange, long socketID, ObjectWriteProxy writeProxy) throws IOException {
+		// Filtering out subclass objects, which should not be processed here.
+		if (statusChange.getClass().equals(GroupMessageStatusChange.class)) return;
 		// Any other status than READ is not supposed to be sent to the server
 		if (statusChange.get() != MessageStatus.READ) throw new IOException(new EnvoyException(statusChange + " has an invalid status"));