diff --git a/addons/base_calendar/base_calendar.py b/addons/base_calendar/base_calendar.py
index cc24d131e39..320004ae11d 100644
--- a/addons/base_calendar/base_calendar.py
+++ b/addons/base_calendar/base_calendar.py
@@ -408,8 +408,7 @@ property or property parameter."),
         except ImportError:
             return res
         cal = vobject.iCalendar()
-        event = cal.add('vevent')
-        event.add('uid').value = 'OpenObject-%s_%s@%s' % (event_obj._name, event_obj.id, cr.dbname)
+        event = cal.add('vevent')        
         event.add('created').value = ics_datetime(time.strftime('%Y-%m-%d %H:%M:%S'))
         event.add('dtstart').value = ics_datetime(event_obj.date)
         event.add('dtend').value = ics_datetime(event_obj.date_deadline)
diff --git a/addons/crm/crm_meeting_view.xml b/addons/crm/crm_meeting_view.xml
index 6759590d89d..a5379b33f3f 100644
--- a/addons/crm/crm_meeting_view.xml
+++ b/addons/crm/crm_meeting_view.xml
@@ -154,7 +154,9 @@
                         <field name="attendee_ids" colspan="4"
                             nolabel="1" widget="one2many" mode="tree,form">
                             <tree string="Invitation details" editable="top">
-                                <field name="email" />
+                                <field name="sent_by_uid" string="From"/>
+                                <field name="user_id" string="To"/>
+                                <field name="email" string="Mail TO"/>
                                 <field name="role" select="1" />
                                 <field name="state" />
                             </tree>
diff --git a/addons/project_caldav/project_caldav_view.xml b/addons/project_caldav/project_caldav_view.xml
index 3055fee85bc..01133108b6d 100644
--- a/addons/project_caldav/project_caldav_view.xml
+++ b/addons/project_caldav/project_caldav_view.xml
@@ -17,7 +17,9 @@
                             <field name="attendee_ids" colspan="4"
                             nolabel="1" widget="one2many" mode="tree,form">
                             <tree string="Assignees details" editable="top">
-                                <field name="email" />
+                                <field name="sent_by_uid" string="From"/>
+                                <field name="user_id" string="To"/>
+                                <field name="email" string="Mail TO"/>
                                 <field name="role" select="1" />
                                 <field name="state" />
                             </tree>