diff --git a/addressbook/js/app.js b/addressbook/js/app.js
index b7e56a7884..a510fb7966 100644
--- a/addressbook/js/app.js
+++ b/addressbook/js/app.js
@@ -129,6 +129,20 @@ app.classes.addressbook = AppJS.extend(
 			}
 			return false;
 		}
+		else if(_app === 'calendar')
+		{
+			// Event changed, update any [known] contacts participating
+			var content = egw.dataGetUIDdata(_app+'::'+_id);
+			if (content.data && content.data.participant_types && content.data.participant_types.c)
+			{
+				for(var contact in content.data.participant_types.c)
+				{
+					// Refresh handles checking to see if the contact is known,
+					// and updating it directly
+					egw.dataRefreshUID('addressbook::'+contact);
+				}
+			}
+		}
 
 		return true;
 	},
diff --git a/api/src/Etemplate/Widget/Nextmatch.php b/api/src/Etemplate/Widget/Nextmatch.php
index 95f0db053f..8d88266522 100644
--- a/api/src/Etemplate/Widget/Nextmatch.php
+++ b/api/src/Etemplate/Widget/Nextmatch.php
@@ -392,7 +392,9 @@ class Nextmatch extends Etemplate\Widget
 				// check if we need to send the data
 				//error_log("$id Known: " . (array_search($id, $knownUids) !== false ? 'Yes' : 'No') . ' Modified: ' . Api\DateTime::to($row[$row_modified]) . ' > ' . Api\DateTime::to($lastModified).'? ' . ($row[$row_modified] > $lastModified ? 'Yes' : 'No'));
 				if (!$row_id || !$knownUids || ($kUkey = array_search($id, $knownUids)) === false ||
-					!$lastModified || !isset($modified) || $modified > $lastModified)
+					!$lastModified || !isset($modified) || $modified > $lastModified ||
+					$queriedRange['refresh'] && $id == $queriedRange['refresh']
+				)
 				{
 					$result['data'][$id] = $row;
 				}