diff --git a/addressbook/inc/class.bocontacts.inc.php b/addressbook/inc/class.bocontacts.inc.php
index c8e5acabae..d9e61f567d 100755
--- a/addressbook/inc/class.bocontacts.inc.php
+++ b/addressbook/inc/class.bocontacts.inc.php
@@ -926,6 +926,7 @@ class bocontacts extends socontacts
 				'email' => $contact['email'] ? $contact['email'] : $contact['email_home'],
 				'rights' => EGW_ACL_READ_FOR_PARTICIPANTS,
 				'name' => $this->link_title($contact),
+				'cn' => trim($contact['n_given'].' '.$contact['n_family']),
 			);
 		}
 		//echo "<p>calendar_info(".print_r($ids,true).")="; _debug_array($data);
diff --git a/calendar/inc/class.boical.inc.php b/calendar/inc/class.boical.inc.php
index 89bade95b6..1f01af508c 100644
--- a/calendar/inc/class.boical.inc.php
+++ b/calendar/inc/class.boical.inc.php
@@ -219,7 +219,7 @@
 											break;
 									};
 									$parameters['ATTENDEE'][] = array(
-										'CN'       => $info['name'],
+										'CN'       => $info['cn'] ? $info['cn'] : $info['name'],
 										'ROLE'     => $role,
 										'PARTSTAT' => $status,
 										'CUTYPE'   => $cutype,