ZP-838 Changed description and default value to 512. Updated link to

ticket ZP-302.

Released under the Affero GNU General Public License (AGPL) version 3.

src/config.php

@@ -186,12 +186,14 @@
     // SYNC_FILEAS_LASTFIRST will be used
     define('FILEAS_ORDER', SYNC_FILEAS_LASTFIRST);
 
-    // Amount of items to be synchronized per request
+    // Maximum amount of items to be synchronized per request.
     // Normally this value is requested by the mobile. Common values are 5, 25, 50 or 100.
     // Exporting too much items can cause mobile timeout on busy systems.
-    // Z-Push will use the lowest value, either set here or by the mobile.
-    // default: 100 - value used if mobile does not limit amount of items
-    define('SYNC_MAX_ITEMS', 100);
+    // Z-Push will use the lowest provided value, either set here or by the mobile.
+    // MS Outlook 2013+ request up to 512 items to accelerate the sync process.
+    // If you detect high load (also on subsystems) you could try a lower setting.
+    // max: 512 - value used if mobile does not limit amount of items
+    define('SYNC_MAX_ITEMS', 512);
 
     // The devices usually send a list of supported properties for calendar and contact
     // items. If a device does not includes such a supported property in Sync request,
@@ -200,7 +202,7 @@
     // to tell if a property was deleted or it was not set at all if it does not appear in Sync.
     // This parameter defines Z-Push behaviour during Sync if a device does not issue a list with
     // supported properties.
-    // See also https://jira.zarafa.com/browse/ZP-302.
+    // See also https://jira.z-hub.io/browse/ZP-302.
     // Possible values:
     // false - do not unset properties which are not sent during Sync (default)
     // true  - unset properties which are not sent during Sync