diff --git a/chat/indico_chat/controllers/event_mgmt.py b/chat/indico_chat/controllers/event_mgmt.py
index ac698d6..3202482 100644
--- a/chat/indico_chat/controllers/event_mgmt.py
+++ b/chat/indico_chat/controllers/event_mgmt.py
@@ -71,9 +71,10 @@ class RHChatManageEvent(RHChatManageEventBase):
                                                             _eager='chatroom.events').all()
         chatroom_filter = (~Chatroom.id.in_(x.chatroom_id for x in chatrooms)) if chatrooms else True
         available_chatrooms = Chatroom.find_all(Chatroom.created_by_id == int(session.user.id), chatroom_filter)
+        logs_enabled = current_plugin.settings.get('log_url')
         return WPChatEventMgmt.render_template('manage_event.html', self._conf, event_chatrooms=chatrooms,
                                                event=self.event, chat_links=current_plugin.settings.get('chat_links'),
-                                               available_chatrooms=available_chatrooms)
+                                               available_chatrooms=available_chatrooms, logs_enabled=logs_enabled)
 
 
 class RHChatManageEventModify(RHEventChatroomMixin, RHChatManageEventBase):
@@ -108,16 +109,21 @@ class RHChatManageEventRefresh(RHEventChatroomMixin, RHChatManageEventBase):
         RHEventChatroomMixin._checkParams(self)
 
     def _process(self):
+        if self.chatroom.custom_server:
+            return jsonify(result='')
+
         config = get_room_config(self.chatroom.jid)
         if config is None:
             if not room_exists(self.chatroom.jid):
                 return jsonify(result='not-found')
             raise IndicoError(_('Unexpected result from Jabber server'))
+
         changed = False
         for key, value in config.iteritems():
             if getattr(self.chatroom, key) != value:
                 changed = True
                 setattr(self.chatroom, key, value)
+
         return jsonify(result='changed' if changed else '')
 
 
diff --git a/chat/indico_chat/forms.py b/chat/indico_chat/forms.py
index ca5f9e8..585c5d7 100644
--- a/chat/indico_chat/forms.py
+++ b/chat/indico_chat/forms.py
@@ -58,11 +58,12 @@ class AddChatroomForm(EditChatroomForm):
             raise ValidationError(_('Could not convert name to a jabber ID'))
         if Chatroom.find_first(jid_node=jid, custom_server=self.custom_server.data):
             raise ValidationError(_('A room with this name already exists'))
-        tmp_room = Chatroom(jid_node=jid, custom_server=self.custom_server.data)
-        if room_exists(tmp_room.jid):
-            raise ValidationError(_('A room with this name/JID already exists on the Jabber server ({0})').format(
-                tmp_room.jid
-            ))
+        if not self.custom_server.data:
+            tmp_room = Chatroom(jid_node=jid)
+            if room_exists(tmp_room.jid):
+                raise ValidationError(_('A room with this name/JID already exists on the Jabber server ({0})').format(
+                    tmp_room.jid
+                ))
 
     @generated_data
     def jid_node(self):
diff --git a/chat/indico_chat/static/js/chat.js b/chat/indico_chat/static/js/chat.js
index 6a0ec8b..3487f7a 100644
--- a/chat/indico_chat/static/js/chat.js
+++ b/chat/indico_chat/static/js/chat.js
@@ -58,7 +58,12 @@
             var $this = $(this);
             var msg = $T('Do you really want to remove this chatroom from the event?');
             if ($this.data('numEvents') == 1) {
-                msg += '<br>' + $T('Since it is only used in this event, it will be deleted from the Jabber server, too!');
+                msg += '<br>';
+                if ($this.data('customServer')) {
+                    msg += $T('Since it is on an external server, it will not be deleted on that server.');
+                } else {
+                    msg += $T('Since it is only used in this event, it will be deleted from the Jabber server, too!');
+                }
             }
             new ConfirmPopup($T('Delete this chatroom?'), msg, function(confirmed) {
                 if (!confirmed) {
diff --git a/chat/indico_chat/templates/manage_event.html b/chat/indico_chat/templates/manage_event.html
index 893c26d..51b0c8d 100644
--- a/chat/indico_chat/templates/manage_event.html
+++ b/chat/indico_chat/templates/manage_event.html
@@ -10,14 +10,20 @@
             <span><strong>{{ chatroom.name }}</strong></span>
             -
             <a class="chat-toggle-details" href="#">{% trans %}Show Details{% endtrans %}</a>
-            -
-            <a href="{{ url_for_plugin('.manage_rooms_logs', event_chatroom) }}">{% trans %}Logs{% endtrans %}</a>
+            {% if logs_enabled and not chatroom.custom_server %}
+                -
+                <a href="{{ url_for_plugin('.manage_rooms_logs', event_chatroom) }}">{% trans %}Logs{% endtrans %}</a>
+            {% endif %}
             -
             <a href="{{ url_for_plugin('.manage_rooms_modify', event_chatroom) }}">{% trans %}Edit{% endtrans %}</a>
+            {% if not chatroom.custom_server %}
+                -
+                <a class="js-chat-refresh-room" href="#" data-href="{{ url_for_plugin('.manage_rooms_refresh', event_chatroom) }}">{% trans %}Refresh{% endtrans %}</a>
+            {% endif %}
             -
-            <a class="js-chat-refresh-room" href="#" data-href="{{ url_for_plugin('.manage_rooms_refresh', event_chatroom) }}">{% trans %}Refresh{% endtrans %}</a>
-            -
-            <a class="js-chat-remove-room" href="#" data-href="{{ url_for_plugin('.manage_rooms_remove', event_chatroom) }}" data-num-events="{{ chatroom.events | count }}">{% trans %}Remove{% endtrans %}</a>
+            <a class="js-chat-remove-room" href="#" data-href="{{ url_for_plugin('.manage_rooms_remove', event_chatroom) }}" data-num-events="{{ chatroom.events | count }}" data-custom-server="{{ 1 if chatroom.custom_server else 0 }}">
+                {%- trans %}Remove{% endtrans -%}
+            </a>
             {% if chat_links %}
                 -
                 <strong><a class="dropDownMenu highlight js-chat-join" href="#" data-server="{{ server }}" data-room="{{ chatroom.jid_node }}">{% trans %}Join now!{% endtrans %}</a></strong>
diff --git a/chat/indico_chat/xmpp.py b/chat/indico_chat/xmpp.py
index 2d951be..75fd523 100644
--- a/chat/indico_chat/xmpp.py
+++ b/chat/indico_chat/xmpp.py
@@ -37,6 +37,9 @@ WHITESPACE = re.compile(r'\s+')
 def create_room(room):
     """Creates a MUC room on the XMPP server."""
 
+    if room.custom_server:
+        return
+
     def _create_room(xmpp):
         muc = xmpp.plugin['xep_0045']
         muc.joinMUC(room.jid, xmpp.requested_jid.user)
@@ -49,6 +52,9 @@ def create_room(room):
 def update_room(room):
     """Updates a MUC room on the XMPP server."""
 
+    if room.custom_server:
+        return
+
     def _update_room(xmpp):
         muc = xmpp.plugin['xep_0045']
         muc.joinMUC(room.jid, xmpp.requested_jid.user)
@@ -61,6 +67,9 @@ def update_room(room):
 def delete_room(room, reason=''):
     """Deletes a MUC room from the XMPP server."""
 
+    if room.custom_server:
+        return
+
     def _delete_room(xmpp):
         muc = xmpp.plugin['xep_0045']
         muc.destroy(room.jid, reason=reason)