diff --git a/src/client/app/tmpl/home.html b/src/client/app/tmpl/home.html
index 5ac30ac..ba22245 100644
--- a/src/client/app/tmpl/home.html
+++ b/src/client/app/tmpl/home.html
@@ -9,7 +9,7 @@
                 <i class="fa fa-info-circle"></i>
                 <%= _lc( 'HOME_GROUPS_NOT_ACTIVE_TEXT1' ) %><strong><%= groupsNotActiveString %></strong><br/>
                     <%= _lc( 'HOME_GROUPS_NOT_ACTIVE_TEXT2' ) %>
-                <a class="btn btn-sm btn-info" href="#/groups"><%= _lc( 'HOME_GROUPS_NOT_ACTIVE_BTN' ) %></a>
+                <a class="" href="#/groups">-> <%= _lc( 'HOME_GROUPS_NOT_ACTIVE_BTN' ) %></a>
             </div>
         </div>
     </div>
diff --git a/src/server/server/control/TB_Server_Control_Appointment.php b/src/server/server/control/TB_Server_Control_Appointment.php
index 37a102b..9624229 100644
--- a/src/server/server/control/TB_Server_Control_Appointment.php
+++ b/src/server/server/control/TB_Server_Control_Appointment.php
@@ -862,6 +862,11 @@ class TB_Server_Control_Appointment {
             throw new \Exception( 'Not visible for current session profile.' );
         }
 
+        if ( false === $appointment->isAttendableByProfile( $sessionProfile ) )
+        {
+            throw new \Exception( 'Not possible to attend by current profile.' );
+        }
+
         //$attendeeData = TB_Shared_Ent_TeamData_Attendee::getWithProfileDataByAppointmentId( $appointment->id );
         $attendeeData = TB_Shared_Ent_TeamData_Attendee::getByAppointmentId( $appointment->id );
         $attendeeProfiles = array();
@@ -1203,6 +1208,11 @@ class TB_Server_Control_Appointment {
             throw new \Exception( 'Not visible by current profile.' );
         }
 
+        if ( false === $appointment->isAttendableByProfile( $sessionProfile ) )
+        {
+            throw new \Exception( 'Not possible to attend by current profile.' );
+        }
+
         $status = $params->get( 'status' );
         if ( !in_array( $status, TB_Shared_Ent_TeamData_Attendee::getValidStatus() ) )
         {