diff --git a/action.php b/action.php
index b19a934..3a34f2e 100644
--- a/action.php
+++ b/action.php
@@ -14,7 +14,7 @@ public function register(Doku_Event_Handler $controller)
     {
         $controller->register_hook('DOKUWIKI_STARTED', 'AFTER', $this, 'handleStart');
         $controller->register_hook('ACTION_ACT_PREPROCESS', 'BEFORE', $this, 'handleAction');
-
+        $controller->register_hook('AJAX_CALL_UNKNOWN', 'BEFORE', $this, 'handleAdminAjax');
     }
 
     /**
@@ -83,5 +83,35 @@ public function handleAction(Doku_Event $event, $param)
         }
     }
 
-}
+    /**
+     * Check username input against all users with saved LMS data
+     * and return a list of matching names
+     *
+     * @param Doku_Event $event
+     * @return void
+     */
+    public function handleAdminAjax(Doku_Event $event)
+    {
+        if ($event->data !== 'plugin_lms_autocomplete') return;
+        global $INPUT;
+
+        if (!checkSecurityToken()) return;
 
+        $event->preventDefault();
+        $event->stopPropagation();
+
+        /** @var helper_plugin_lms $hlp */
+        $hlp = $this->loadHelper('lms');
+
+        $knownUsers = $hlp->getKnownUsers();
+
+        $search = $INPUT->str('user');
+        $found = array_filter($knownUsers, function ($user) use ($search) {
+            return (strstr(strtolower($user), strtolower($search))) !== false ? $user : null;
+        });
+
+        header('Content-Type: application/json');
+
+        echo json_encode($found);
+    }
+}
diff --git a/admin.php b/admin.php
index 692af5c..b7b7e8c 100644
--- a/admin.php
+++ b/admin.php
@@ -27,7 +27,7 @@ public function html()
 
         echo '<h1>' . $this->getLang('menu') . '</h1>';
 
-        $form = new dokuwiki\Form\Form(['method' => 'POST']);
+        $form = new dokuwiki\Form\Form(['method' => 'POST', 'id' => 'lms__admin-autocomplete']);
         $form->addTextInput('user', $this->getLang('username'));
         $form->addButton('submit', '🔍');
         echo '<p>'. $form->toHTML() .'</p>';
@@ -46,15 +46,14 @@ public function html()
             echo html_wikilink($id);
             echo '</td>';
             echo '<td>';
-            if($dt){
+            if ($dt){
                 echo dformat($dt);
+            } else {
+                echo '---';
             }
             echo '</td>';
             echo '</tr>';
         }
         echo '</table>';
-
-
     }
 }
-
diff --git a/helper.php b/helper.php
index 7884053..6f52fb4 100644
--- a/helper.php
+++ b/helper.php
@@ -173,6 +173,23 @@ protected function getUserFile($user)
         return $conf['metadir'] . '_lms/' . $user . '.lms';
     }
 
+    public function getKnownUsers()
+    {
+        global $conf;
+
+        $lmsData = $conf['metadir'] . '_lms/';
+
+        $s = scandir($lmsData);
+
+        $users = array_map(function ($file) {
+            if (!in_array($file, ['.', '..'])) {
+                return str_replace('.lms', '', $file);
+            }
+        }, $s);
+
+        return array_filter($users);
+    }
+
     /**
      * Get a list of links from the given control page
      *
diff --git a/script.js b/script.js
index af6649d..1ab9f29 100644
--- a/script.js
+++ b/script.js
@@ -2,13 +2,15 @@ jQuery(function (){
     if(!JSINFO['plugins']) return;
     if(!JSINFO.plugins['lms']) return;
 
-    jQuery('a.wikilink1, a.wikilink2').each(function (idx, elem){
+    if (JSINFO.ACT !== 'admin') {
+        jQuery('a.wikilink1, a.wikilink2').each(function (idx, elem){
 
-        if(elem['title'] && JSINFO.plugins.lms.seen.includes(elem.title)) {
-            jQuery(elem).addClass('lms-seen');
-        }
+            if(elem['title'] && JSINFO.plugins.lms.seen.includes(elem.title)) {
+                jQuery(elem).addClass('lms-seen');
+            }
 
-    });
+        });
+    }
 
     // mark whole sections seen
     const navheaders = jQuery('nav div.content h1, nav div.content h2, nav div.content h3, nav div.content h4, nav div.content h5');
@@ -21,4 +23,20 @@ jQuery(function (){
         }
     });
 
+    /**
+     * admin interface: autocomplete users
+     */
+    const $form = jQuery('.dokuwiki.mode_admin form#lms__admin-autocomplete');
+    if (!$form.length) return;
+
+    $form.find('input')
+        .autocomplete({
+            source: function (request, response) {
+                jQuery.getJSON(DOKU_BASE + 'lib/exe/ajax.php?call=plugin_lms_autocomplete', {
+                    user: request.term,
+                    sectok: $form.find('input[name="sectok"]').val()
+                }, response);
+            },
+            minLength: 0
+        });
 });