diff --git a/group/autogroup.php b/group/autogroup.php
index b66ca45cb3ae8..206cfd040ed5d 100644
--- a/group/autogroup.php
+++ b/group/autogroup.php
@@ -171,7 +171,7 @@
             $table->width = '90%';
         }
         $table->data  = array();
-
+        $viewfullnames = has_capability('moodle/site:viewfullnames', $context);
         foreach ($groups as $group) {
             $line = array();
             if (groups_get_group_by_name($courseid, $group['name'])) {
@@ -183,7 +183,7 @@
             if ($data->allocateby != 'no') {
                 $unames = array();
                 foreach ($group['members'] as $user) {
-                    $unames[] = fullname($user, true);
+                    $unames[] = fullname($user, $viewfullnames);
                 }
                 $line[] = implode(', ', $unames);
                 $line[] = count($group['members']);
diff --git a/group/classes/output/user_groups_editable.php b/group/classes/output/user_groups_editable.php
index aa6b98afd4bbb..13dba2adad91f 100644
--- a/group/classes/output/user_groups_editable.php
+++ b/group/classes/output/user_groups_editable.php
@@ -77,8 +77,10 @@ public function __construct($course, $context, $user, $coursegroups, $value) {
         foreach ($coursegroups as $group) {
             $options[$group->id] = format_string($group->name, true, ['context' => $this->context]);
         }
-        $this->edithint = get_string('editusersgroupsa', 'group', fullname($user));
-        $this->editlabel = get_string('editusersgroupsa', 'group', fullname($user));
+
+        $fullname = fullname($user, has_capability('moodle/site:viewfullnames', $this->context));
+        $this->edithint = get_string('editusersgroupsa', 'group', $fullname);
+        $this->editlabel = get_string('editusersgroupsa', 'group', $fullname);
 
         $attributes = ['multiple' => true];
         $this->set_type_autocomplete($options, $attributes);
diff --git a/group/externallib.php b/group/externallib.php
index bebede4fd4b96..341e72750a886 100644
--- a/group/externallib.php
+++ b/group/externallib.php
@@ -556,7 +556,8 @@ public static function delete_group_members($members) {
             require_capability('moodle/course:managegroups', $context);
 
             if (!groups_remove_member_allowed($group, $user)) {
-                throw new moodle_exception('errorremovenotpermitted', 'group', '', fullname($user));
+                $fullname = fullname($user, has_capability('moodle/site:viewfullnames', $context));
+                throw new moodle_exception('errorremovenotpermitted', 'group', '', $fullname);
             }
             groups_remove_member($group, $user);
         }
diff --git a/group/index.php b/group/index.php
index 79c9e21aabd5c..ab3fb04d89831 100644
--- a/group/index.php
+++ b/group/index.php
@@ -81,6 +81,9 @@
     case 'ajax_getmembersingroup':
         $roles = array();
         if ($groupmemberroles = groups_get_members_by_role($groupids[0], $courseid, 'u.id, ' . get_all_user_name_fields(true, 'u'))) {
+
+            $viewfullnames = has_capability('moodle/site:viewfullnames', $context);
+
             foreach($groupmemberroles as $roleid=>$roledata) {
                 $shortroledata = new stdClass();
                 $shortroledata->name = $roledata->name;
@@ -88,7 +91,7 @@
                 foreach($roledata->users as $member) {
                     $shortmember = new stdClass();
                     $shortmember->id = $member->id;
-                    $shortmember->name = fullname($member, true);
+                    $shortmember->name = fullname($member, $viewfullnames);
                     $shortroledata->users[] = $shortmember;
                 }
                 $roles[] = $shortroledata;
@@ -190,12 +193,15 @@
 if ($singlegroup) {
     $usernamefields = get_all_user_name_fields(true, 'u');
     if ($groupmemberroles = groups_get_members_by_role(reset($groupids), $courseid, 'u.id, ' . $usernamefields)) {
+
+        $viewfullnames = has_capability('moodle/site:viewfullnames', $context);
+
         foreach ($groupmemberroles as $roleid => $roledata) {
             $users = array();
             foreach ($roledata->users as $member) {
                 $users[] = (object)[
                     'value' => $member->id,
-                    'text' => fullname($member, true)
+                    'text' => fullname($member, $viewfullnames)
                 ];
             }
             $members[] = (object)[
diff --git a/group/overview.php b/group/overview.php
index 785cc6356ff51..d4619a6596277 100644
--- a/group/overview.php
+++ b/group/overview.php
@@ -248,9 +248,11 @@
             $line[] = html_writer::tag('span', $name, array('class' => 'group_hoverdescription', 'data-groupid' => $gpid));
             $hoverevents[$gpid] = get_string('descriptiona', null, $jsdescription);
         }
+        $viewfullnames = has_capability('moodle/site:viewfullnames', $context);
         $fullnames = array();
         foreach ($users as $user) {
-            $fullnames[] = '<a href="'.$CFG->wwwroot.'/user/view.php?id='.$user->id.'&amp;course='.$course->id.'">'.fullname($user, true).'</a>';
+            $fullnames[] = html_writer::link(new moodle_url('/user/view.php', ['id' => $user->id, 'course' => $course->id]),
+                fullname($user, $viewfullnames));
         }
         $line[] = implode(', ', $fullnames);
         $line[] = count($users);