diff --git a/lib/LMSManagers/LMSEventManager.php b/lib/LMSManagers/LMSEventManager.php
index 4b087f685d..bc4727161d 100644
--- a/lib/LMSManagers/LMSEventManager.php
+++ b/lib/LMSManagers/LMSEventManager.php
@@ -293,9 +293,9 @@ public function GetEvent($id)
         $event['helpdesk'] = !empty($event['ticketid']);
 
         $event['userlist'] = $this->db->GetAllByKey(
-            'SELECT u.id, u.rname, u.name, u.login
+            'SELECT u.id, u.rname, u.name, u.login, u.deleted, u.access
             FROM vusers u
-            JOIN eventassignments a ON a.userid = u.id
+                JOIN eventassignments a ON a.userid = u.id
             WHERE a.eventid = ?',
             'id',
             array($id)
@@ -514,11 +514,12 @@ public function GetEventList(array $params)
                     $row['nodelocation'] = $customerstuffaddresses[$row['customerid']];
                 }
 
-                $row['userlist'] = $this->db->GetAll(
+                $row['userlist'] = $this->db->GetAllByKey(
                     'SELECT userid AS id, vusers.name,
                     vusers.access, vusers.deleted, vusers.accessfrom, vusers.accessto
                     FROM eventassignments, vusers
                     WHERE userid = vusers.id AND eventid = ? ',
+                    'id',
                     array($row['id'])
                 );
 
diff --git a/lib/LMSManagers/LMSHelpdeskManager.php b/lib/LMSManagers/LMSHelpdeskManager.php
index b2f9d241bd..af0a9bbda3 100644
--- a/lib/LMSManagers/LMSHelpdeskManager.php
+++ b/lib/LMSManagers/LMSHelpdeskManager.php
@@ -893,10 +893,13 @@ public function GetUserRightsToCategory($user, $category, $ticket = null)
         return ($owner === '1');
     }
 
-    public function GetCategoryList($stats = true)
+    public function GetCategoryList($stats = true, $owners = true)
     {
-        if ($result = $this->db->GetAll('SELECT id, name, description, style
-				FROM rtcategories ORDER BY name')) {
+        if ($result = $this->db->GetAll(
+            'SELECT id, name, description, style
+                FROM rtcategories
+                ORDER BY name'
+        )) {
             if ($stats) {
                 foreach ($result as $idx => $row) {
                     foreach ($this->GetCategoryStats($row['id']) as $sidx => $row2) {
@@ -904,15 +907,27 @@ public function GetCategoryList($stats = true)
                     }
                 }
             }
-            foreach ($result as $idx => $category) {
-                $result[$idx]['owners'] = $this->db->GetAll('SELECT u.id, name FROM rtcategoryusers cu
-				LEFT JOIN vusers u ON cu.userid = u.id
-				WHERE categoryid = ?', array($category['id']));
+            if ($owners) {
+                foreach ($result as $idx => $row) {
+                    $result[$idx]['owners'] = $this->GetCategoryUsers($row['id']);
+                }
             }
         }
         return $result;
     }
 
+    public function GetCategoryUsers($categoryid)
+    {
+        return $this->db->GetAll(
+            'SELECT u.id, u.name, u.deleted,
+            (CASE WHEN u.access = 1 AND u.accessfrom <= ?NOW? AND (u.accessto >=?NOW? OR u.accessto = 0) THEN 1 ELSE 0 END) AS access
+            FROM rtcategoryusers cu
+                LEFT JOIN vusers u ON cu.userid = u.id
+            WHERE categoryid = ?',
+            array($categoryid)
+        );
+    }
+
     public function GetCategoryStats($id)
     {
         if ($result = $this->db->GetAll('SELECT state, COUNT(state) AS scount
diff --git a/lib/LMSManagers/LMSHelpdeskManagerInterface.php b/lib/LMSManagers/LMSHelpdeskManagerInterface.php
index 8c74cf6e2e..a4330c9ef6 100644
--- a/lib/LMSManagers/LMSHelpdeskManagerInterface.php
+++ b/lib/LMSManagers/LMSHelpdeskManagerInterface.php
@@ -61,7 +61,9 @@ public function GetCategory($id);
 
     public function GetUserRightsToCategory($user, $category, $ticket = null);
 
-    public function GetCategoryList($stats = true);
+    public function GetCategoryList($stats = true, $owners = true);
+
+    public function GetCategoryUsers($categoryid);
 
     public function GetCategoryStats($id);
 
diff --git a/lib/SmartyPlugins/LMSSmartyPlugins.php b/lib/SmartyPlugins/LMSSmartyPlugins.php
index 2e8b60aa47..82e43a03ef 100644
--- a/lib/SmartyPlugins/LMSSmartyPlugins.php
+++ b/lib/SmartyPlugins/LMSSmartyPlugins.php
@@ -1337,6 +1337,36 @@ public static function networkDeviceTypesFunction(array $params, $template)
             . '</select>';
     }
 
+    public static function userCompactListFunction(array $params, $template)
+    {
+        $default_user_row_limit = 4;
+
+        $elemid = $params['elemid'] ?? false;
+        $elemname = $params['elemname'] ?? false;
+        $class = $params['class'] ?? false;
+        $limit = empty($params['limit']) ? $default_user_row_limit : intval($params['limit']);
+        $userlist = empty($params['userlist']) ? trans('No avaiable users') : $params['userlist'];
+        $usercount = sizeof($userlist);
+        $ul = '';
+
+        foreach ($userlist as $item) {
+            $ul .= '<a href="?m=userinfo&id=' . $item['id'] . '" class="'
+                . (empty($item['deleted']) ? '' : 'crossed disabled')
+                . (empty($item['access']) ? ' blend' : '')
+                . (empty($item['class']) ? '' : ' ' . $class)
+                . '" style="font-weight: normal">'
+                . htmlspecialchars(substr(trans($item['name']), 0, 40))
+                . '</a><br>';
+        }
+
+        return '<div '
+            . ($elemname ? ' name="' . $elemname . '"' : '')
+            . ($elemid ? ' id="' . $elemid . '"' : '') . '>'
+            . ($usercount < $limit ?
+                $ul : self::hintFunction(array('content' => $ul, 'icon' => 'user'), $template) . $usercount)
+            . '</div>';
+    }
+
     public static function userSelectionFunction(array $params, $template)
     {
         static $userlist = array();
diff --git a/lib/SmartyPlugins/function.user_compact_list.php b/lib/SmartyPlugins/function.user_compact_list.php
new file mode 100644
index 0000000000..ce2eec545c
--- /dev/null
+++ b/lib/SmartyPlugins/function.user_compact_list.php
@@ -0,0 +1,30 @@
+<?php
+
+/*
+ * LMS version 1.11-git
+ *
+ *  (C) Copyright 2001-2021 LMS Developers
+ *
+ *  Please, see the doc/AUTHORS for more information about authors!
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License Version 2 as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ *  USA.
+ *
+ *  $Id$
+ */
+
+function smarty_function_user_compact_list($params, $template)
+{
+    return LMSSmartyPlugins::userCompactListFunction($params, $template);
+}
diff --git a/modules/eventinfo.php b/modules/eventinfo.php
index 312aa443bd..52a7be5911 100644
--- a/modules/eventinfo.php
+++ b/modules/eventinfo.php
@@ -27,6 +27,10 @@
 if (!$_GET['id']) {
     $SESSION->redirect('?m=eventlist');
 }
+$user_row_limit = ConfigHelper::getConfig(
+    'timetable.row_user_limit',
+    ConfigHelper::getConfig('phpui.timetable_user_row_limit', 4)
+);
 
 $event = $LMS->GetEvent($_GET['id']);
 
@@ -34,6 +38,11 @@
 
 $SESSION->add_history_entry();
 
-$SMARTY->assign('event', $event);
+$SMARTY->assign(
+    array(
+        'event' => $event,
+        'user_row_limit' => $user_row_limit,
+    )
+);
 
 $SMARTY->display('event/eventinfo.html');
diff --git a/modules/eventlist.php b/modules/eventlist.php
index f43cb5543b..281af386d3 100644
--- a/modules/eventlist.php
+++ b/modules/eventlist.php
@@ -38,6 +38,7 @@
 $hide_disabled_users = ConfigHelper::checkConfig('timetable.hide_disabled_users', ConfigHelper::checkConfig('phpui.timetable_hide_disabled_users'));
 $show_delayed_events = ConfigHelper::checkConfig('timetable.show_delayed_events', ConfigHelper::checkConfig('phpui.timetable_overdue_events'));
 $big_networks = ConfigHelper::checkConfig('phpui.big_networks');
+$user_row_limit = ConfigHelper::getConfig('timetable.row_user_limit', ConfigHelper::getConfig('phpui.timetable_user_row_limit', 4));
 $params['userid'] = Auth::GetCurrentUser();
 
 if (!empty($filter['edate'])) {
@@ -248,5 +249,6 @@
         'overdue_events_only' => $overdue_events_only,
         'getHolidays', getHolidays($year ?? null),
         'customerlist' => $big_networks ? null : $LMS->GetCustomerNames(),
+        'user_row_limit' => $user_row_limit,
     ));
 $SMARTY->display('event/eventlist.html');
diff --git a/templates/default/event/eventinfo.html b/templates/default/event/eventinfo.html
index 76fdde7e2f..0d8e92fbc8 100644
--- a/templates/default/event/eventinfo.html
+++ b/templates/default/event/eventinfo.html
@@ -301,12 +301,7 @@ <h1>{$layout.pagetitle}</h1>
 					<strong>{trans("Users")}</strong>
 				</td>
 				<td class="nobr">
-					{foreach $event.userlist as $userid => $user}
-						<a href="?m=userinfo&id={$userid}">{$user.rname|escape}</a>
-						{if !$user@last}
-							<br>
-						{/if}
-					{/foreach}
+					{user_compact_list limit=$user_row_limit userlist=$event.userlist}
 				</td>
 			</tr>
 		{/if}
diff --git a/templates/default/event/eventlistboxrow.html b/templates/default/event/eventlistboxrow.html
index 85a26ee2f0..03f06e1906 100644
--- a/templates/default/event/eventlistboxrow.html
+++ b/templates/default/event/eventlistboxrow.html
@@ -15,7 +15,7 @@
             </a>
         {/if}
     </td>
-    <TD class="text-left nobr bold" style="min-width:100px" data-target-url="?m=eventinfo&id={$event.id}">
+    <TD class="text-left nobr bold" style="min-width:100px">
         {if $event.endtime == 86400}
             {trans("whole day")}
         {else}
@@ -28,24 +28,11 @@
         {if $overdue == 1}
             <br>{$event.date|date_format:"Y-m-d"}
         {/if}
-        {$imadded=0}
-        {$user_row_limit = intval(ConfigHelper::getConfig('timetable.row_user_limit', ConfigHelper::getConfig('phpui.timetable_user_row_limit', 4)))}
-        {if !empty($event.userlist)}
-            {if !$user_row_limit || count($event.userlist) <= $user_row_limit}
-                {foreach $event.userlist as $user}
-                    {if $layout.logid == $user.id}
-                        {$imadded=1}
-                    {/if}
-                    <br>
-                    <a href="?m=userinfo&amp;id={$user.id}"
-                       style="font-weight: normal;" {if isset($user.noaccess)} class="lms-ui-crossed"{/if}>{$user.name|trunescape:25}</a>
-                {/foreach}
-            {else}
-                <br>
-                <i class="lms-ui-icon-user lms-ui-hint-rollover"
-                   data-url="?m=eventinfoshort&id={$event.id}"></i>
-                {$event.userlist|@count}
-            {/if}
+        {user_compact_list limit=$user_row_limit userlist=$event.userlist}
+        {if in_array($layout.logid, array_column($event.userlist, 'id'))}
+            {assign var="imadded" value=1}
+        {else}
+            {assign var="imadded" value=0}
         {/if}
     </TD>
     <TD data-target-url="?m=eventinfo&id={$event.id}">
diff --git a/templates/default/rt/rtcategorylist.html b/templates/default/rt/rtcategorylist.html
index 283900775b..f9988aaa61 100644
--- a/templates/default/rt/rtcategorylist.html
+++ b/templates/default/rt/rtcategorylist.html
@@ -1,6 +1,8 @@
 {extends file="layout.html"}
 {block name=title}LMS: {$layout.pagetitle|striphtml}{/block}
 {block name=module_content}
+{$user_row_limit = ConfigHelper::getConfig('rt.row_user_limit', 4)}
+
 <!-- $Id$ -->
 <h1>{$layout.pagetitle}</h1>
 <table class="lmsbox lms-ui-background-cycle">
@@ -59,9 +61,7 @@ <h1>{$layout.pagetitle}</h1>
 					</div>
 				</td>
 				<td class="lms-ui-buttons">
-					{foreach $category.owners as $key => $owner}
-						<a href="?m=userinfo&id={$owner.id}">{$owner.name}</a>{if $key+1<count($category.owners)}, {/if}
-					{/foreach}
+				{user_compact_list limit=$user_row_limit userlist=$category.owners}
 				</td>
 				<td class="text-center">
 					{$category.new|default:0}