diff --git a/modules/features/teamsbot/routeFeatureTeamsbot.py b/modules/features/teamsbot/routeFeatureTeamsbot.py
index b185528a..a441d461 100644
--- a/modules/features/teamsbot/routeFeatureTeamsbot.py
+++ b/modules/features/teamsbot/routeFeatureTeamsbot.py
@@ -212,8 +212,18 @@ async def startSession(
 
     if systemBot:
         if not effectiveBotName:
-            effectiveBotName = systemBot.get("name") or effectiveConfig.botName
-        logger.info(f"System bot found: {systemBot.get('name')} ({systemBot.get('email')})")
+            effectiveBotName = systemBot.get("name")
+        # Derive display name from email if system bot has no explicit name
+        # e.g. "nyla.larsson@poweron.swiss" → "Nyla Larsson"
+        if not effectiveBotName:
+            sbEmail = systemBot.get("email", "")
+            if sbEmail and "@" in sbEmail:
+                emailPrefix = sbEmail.split("@")[0]
+                effectiveBotName = " ".join(part.capitalize() for part in emailPrefix.split("."))
+                logger.info(f"Bot name derived from email: {effectiveBotName}")
+        if not effectiveBotName:
+            effectiveBotName = effectiveConfig.botName
+        logger.info(f"System bot found: {systemBot.get('name')} ({systemBot.get('email')}), effectiveBotName={effectiveBotName}")
 
         # Load and decrypt credentials for authenticated join
         botAccountEmail = systemBot.get("email")
diff --git a/modules/features/teamsbot/service.py b/modules/features/teamsbot/service.py
index 7251741e..83e7a251 100644
--- a/modules/features/teamsbot/service.py
+++ b/modules/features/teamsbot/service.py
@@ -519,9 +519,9 @@ class TeamsbotService:
     def _isBotSpeaker(self, speaker: str) -> bool:
         """Check if a transcript speaker is the bot itself.
         
-        Teams captions show the bot as e.g. "Shelly Miller (Unverified)" or 
+        Teams captions show the bot as e.g. "BotName (Unverified)" or
         "Nyla Larsson" depending on auth/anonymous join. We match against:
-        - The configured bot name (e.g. "Shelly Miller")
+        - The configured/derived bot name
         - The bot account display name if authenticated
         """
         if not speaker:
@@ -714,18 +714,22 @@ class TeamsbotService:
                     return
 
                 # Determine response channel (voice, chat, or both)
-                channel = self.config.responseChannel
-                responseType = TeamsbotResponseType.BOTH
+                # Normalize to string for reliable comparison (model_copy may skip enum coercion)
+                channelStr = str(self.config.responseChannel).lower().strip()
+                logger.info(f"Response channel: '{channelStr}' (raw={self.config.responseChannel!r})")
                 
-                if channel == TeamsbotResponseChannel.VOICE:
-                    responseType = TeamsbotResponseType.AUDIO
-                elif channel == TeamsbotResponseChannel.CHAT:
-                    responseType = TeamsbotResponseType.CHAT
-                else:
+                sendVoice = channelStr in ("voice", "both")
+                sendChat = channelStr in ("chat", "both")
+                
+                if sendVoice and sendChat:
                     responseType = TeamsbotResponseType.BOTH
+                elif sendVoice:
+                    responseType = TeamsbotResponseType.AUDIO
+                else:
+                    responseType = TeamsbotResponseType.CHAT
 
                 # 4a: Voice response (TTS -> Audio to bot)
-                if channel in (TeamsbotResponseChannel.VOICE, TeamsbotResponseChannel.BOTH):
+                if sendVoice:
                     try:
                         ttsResult = await voiceInterface.textToSpeech(
                             text=speechResult.responseText,
@@ -748,11 +752,11 @@ class TeamsbotService:
                                 logger.info(f"TTS audio generated for session {sessionId} (HTTP mode - no WebSocket for playback)")
                     except Exception as ttsErr:
                         logger.warning(f"TTS failed for session {sessionId}: {ttsErr}")
-                        if responseType == TeamsbotResponseType.AUDIO:
-                            responseType = TeamsbotResponseType.CHAT  # Fallback to chat only
+                        if not sendChat:
+                            sendChat = True  # Fallback to chat if voice-only and TTS failed
 
                 # 4b: Chat response (send text message to meeting chat)
-                if channel in (TeamsbotResponseChannel.CHAT, TeamsbotResponseChannel.BOTH):
+                if sendChat:
                     try:
                         if websocket:
                             await websocket.send_text(json.dumps({
@@ -760,6 +764,7 @@ class TeamsbotService:
                                 "sessionId": sessionId,
                                 "text": speechResult.responseText,
                             }))
+                            logger.info(f"Chat response sent for session {sessionId}")
                     except Exception as chatErr:
                         logger.warning(f"Chat message send failed for session {sessionId}: {chatErr}")