diff --git a/gen_polycom_directory.php b/gen_polycom_directory.php
index 5216a01..7358f8b 100755
--- a/gen_polycom_directory.php
+++ b/gen_polycom_directory.php
@@ -16,7 +16,7 @@
 $bootstrap_settings['freepbx_auth'] = false;
 require_once('/etc/freepbx.conf');
 
-$provision_dir = '/tftpboot/directory';                                // <-- adjust if needed
+$provision_dir = '/tftpboot';                                // <-- adjust if needed
 $out_file      = $provision_dir . '/000000000000-directory.xml';
 $do_notify     = in_array('--notify', $argv, true);
 
@@ -125,15 +125,43 @@ echo "Wrote $out_file with " . $root->childNodes->length . " contacts\n";
 
 /** Optional: push check-sync to re-download directory without reboot */
 if ($do_notify) {
-    // Use the extension list we already built
-    $notified = 0;
-    foreach ($rows as $r) {
-        $ext = trim((string)$r['extension']);
-        if ($ext === '') continue;
-        // In FreePBX, PJSIP endpoint id is typically the extension number
-        $cmd = "asterisk -rx \"pjsip send notify polycom-check-cfg endpoint " . escapeshellarg($ext) . "\"";
-        exec($cmd, $o, $rc);
-        if ($rc === 0) $notified++;
+    $asteriskBin = '/usr/sbin/asterisk';
+
+    $excludedEndpoints = [
+        '101', '102', '103', '104', '105', '106', '107', '108', '109', '110', '111', '112', '113', '114', '900', 'Voyant', '<Endpoint dpma_endpoint'
+    ];
+
+    // Get all endpoints from Asterisk CLI
+    $cmd = escapeshellcmd($asteriskBin) . ' -rx "pjsip show endpoints"';
+    exec($cmd, $output, $returnCode);
+
+    if ($returnCode !== 0) {
+        die("Failed to connect to Asterisk CLI.\n");
     }
-    echo "Sent check-sync to $notified endpoints\n";
+
+    // Parse endpoint names (mirror sed: capture until space or slash)
+    $endpoints = [];
+    foreach ($output as $line) {
+        if (preg_match('/^\s*Endpoint:\s+([^\/\s]+)/', $line, $matches)) {
+            $ep = trim($matches[1]);
+            if (!in_array($ep, ['anonymous', 'system']) && !in_array($ep, $excludedEndpoints)) {
+                $endpoints[] = $ep;
+            }
+        }
+    }
+
+    $endpoints = array_unique($endpoints);
+
+    // Send check-sync NOTIFY to each endpoint
+    foreach ($endpoints as $ep) {
+        echo "Sending check-sync to $ep\n";
+        $notifyCmd = sprintf(
+            '%s -rx "pjsip send notify polycom-check-cfg endpoint %s"',
+            escapeshellarg($asteriskBin),
+            escapeshellarg($ep)
+        );
+        exec($notifyCmd);
+    }
+
+    echo "Done.\n";
 }
diff --git a/readme.md b/readme.md
index a5d4b57..cce8ce2 100644
--- a/readme.md
+++ b/readme.md
@@ -1,12 +1,16 @@
 ## Gen PC Sidecar Script
 The files are stored typically inside of `/var/lib/asterisk/PC-Contact-Sync` and the scripts should be run every 6 hours by a cron job.
 
+Make sure that all files are owned by asterisk user including the output files and the cronjob.
+
 <br>
 
 ## Quickstart
 #### Config Fields
 `config.json` has several fields. The config file needs to  be next to the script in order to be read.
 
+See the example [config.json](./config.json) included.
+
 <br>
 <div style="border-left: 6px solid #FFA500; padding: 10px;">
 <strong>⚠️ Warning:</strong> Make sure the config follows proper json syntax.
@@ -31,10 +35,17 @@ prepend_extensions
 <br>
 
 #### Cronjob Example
+Create the cronjob as asterisk user.
+
+```
+EDITOR=vim crontab -e -u asterisk
+```
+
+Append this to the crontab
 
 ```
 # Run Polycom directory sync every 4 hours at :00
-0 */4 * * * /usr/bin/php /var/lib/asterisk/PC-Contact-Sync/gen_polycom_directory.php >> /var/log/gen_polycom_directory.log 2>&1
+0 */4 * * * /usr/bin/php /var/lib/asterisk/PC-Contact-Sync/gen_polycom_directory.php --notify >> /var/log/gen_polycom_directory.log 2>&1
 
 # Run PC sidecar sync every 4 hours at :05 (5 mins after)
 5 */4 * * * /usr/bin/php /var/lib/asterisk/PC-Contact-Sync/gen_pc_sidecar.php >> /var/log/gen_pc_sidecar.log 2>&1