diff --git a/admin/index.php b/admin/index.php
index 90d5307ecb7..33786fc3af6 100644
--- a/admin/index.php
+++ b/admin/index.php
@@ -937,6 +937,13 @@ $result = new environment_results('custom_checks');
 $result = check_xmlrpc_usage($result);
 $xmlrpcwarning = !is_null($result) ? get_string($result->getFeedbackStr(), 'admin') : '';
 
+// Check whether MoodleNet features are enabled and warn about removal.
+$moodlenetwarning = '';
+$moodlenetenabled = get_config('tool_moodlenet', 'enablemoodlenet');
+if ($moodlenetenabled) {
+    $moodlenetwarning = get_string('moodlenetremovalwarning', 'admin');
+}
+
 admin_externalpage_setup('adminnotifications');
 
 $output = $PAGE->get_renderer('core', 'admin');
@@ -946,4 +953,4 @@ echo $output->admin_notifications_page($maturity, $insecuredataroot, $errorsdisp
                                        $registered, $cachewarnings, $eventshandlers, $themedesignermode, $devlibdir,
                                        $mobileconfigured, $overridetossl, $invalidforgottenpasswordurl, $croninfrequent,
                                        $showcampaigncontent, $showfeedbackencouragement, $servicesandsupportcontent,
-                                       $xmlrpcwarning);
+                                       $xmlrpcwarning, $moodlenetwarning);
diff --git a/admin/renderer.php b/admin/renderer.php
index 93c4943db9c..57873da1b8c 100644
--- a/admin/renderer.php
+++ b/admin/renderer.php
@@ -279,6 +279,7 @@ class core_admin_renderer extends plugin_renderer_base {
      * @param bool $showfeedbackencouragement Whether the feedback encouragement content should be displayed or not.
      * @param bool $showservicesandsupport Whether the services and support content should be displayed or not.
      * @param string $xmlrpcwarning XML-RPC deprecation warning message.
+     * @param string $moodlenetwarning MoodleNet removal warning message.
      *
      * @return string HTML to output.
      */
@@ -288,7 +289,7 @@ class core_admin_renderer extends plugin_renderer_base {
             $themedesignermode = false, $devlibdir = false, $mobileconfigured = false,
             $overridetossl = false, $invalidforgottenpasswordurl = false, $croninfrequent = false,
             $showcampaigncontent = false, bool $showfeedbackencouragement = false, bool $showservicesandsupport = false,
-            $xmlrpcwarning = '') {
+            $xmlrpcwarning = '', $moodlenetwarning = '') {
 
         global $CFG;
         $output = '';
@@ -313,6 +314,7 @@ class core_admin_renderer extends plugin_renderer_base {
         $output .= $this->mobile_configuration_warning($mobileconfigured);
         $output .= $this->forgotten_password_url_warning($invalidforgottenpasswordurl);
         $output .= $this->mnet_deprecation_warning($xmlrpcwarning);
+        $output .= $this->moodlenet_removal_warning($moodlenetwarning);
         $output .= $this->userfeedback_encouragement($showfeedbackencouragement);
         $output .= $this->services_and_support_content($showservicesandsupport);
         $output .= $this->campaign_content($showcampaigncontent);
@@ -2326,6 +2328,20 @@ class core_admin_renderer extends plugin_renderer_base {
         return $this->warning($xmlrpcwarning);
     }
 
+    /**
+     * Display a warning about the removal of MoodleNet integration.
+     *
+     * @param string $moodlenetwarning The warning message
+     * @return string HTML to output.
+     */
+    protected function moodlenet_removal_warning($moodlenetwarning) {
+        if (empty($moodlenetwarning)) {
+            return '';
+        }
+
+        return $this->warning($moodlenetwarning);
+    }
+
     /**
      * Renders the theme selector list.
      *
diff --git a/admin/tool/moodlenet/lang/en/tool_moodlenet.php b/admin/tool/moodlenet/lang/en/tool_moodlenet.php
index 0e8ea8a0504..5c419a3b392 100644
--- a/admin/tool/moodlenet/lang/en/tool_moodlenet.php
+++ b/admin/tool/moodlenet/lang/en/tool_moodlenet.php
@@ -38,6 +38,9 @@ $string['defaultmoodlenet_desc'] = 'The URL of the MoodleNet instance available
 $string['defaultmoodlenetname'] = "MoodleNet instance name";
 $string['defaultmoodlenetnamevalue'] = 'MoodleNet Central';
 $string['defaultmoodlenetname_desc'] = 'The name of the MoodleNet instance available via the activity chooser.';
+$string['removalwarning_feature'] = 'If you need to continue using MoodleNet, contact your site administrator about setting up a self-hosted MoodleNet instance.';
+$string['removalwarning_service'] = 'After the date, you will no longer be able to browse or add content from MoodleNet Central.';
+$string['removalwarning_title'] = 'The MoodleNet service will be shut down on 20 April 2026.';
 $string['enablemoodlenet'] = 'Enable MoodleNet integration (inbound)';
 $string['enablemoodlenet_desc'] = 'If enabled, a user with the capability to create and manage activities can browse MoodleNet via the activity chooser and import MoodleNet resources into their course. In addition, a user with the capability to restore backups can select a backup file on MoodleNet and restore it into Moodle.';
 $string['errorduringdownload'] = 'An error occurred while downloading the file: {$a}';
diff --git a/admin/tool/moodlenet/templates/chooser_moodlenet.mustache b/admin/tool/moodlenet/templates/chooser_moodlenet.mustache
index a812e5402cd..a2b37b5cfd5 100644
--- a/admin/tool/moodlenet/templates/chooser_moodlenet.mustache
+++ b/admin/tool/moodlenet/templates/chooser_moodlenet.mustache
@@ -27,8 +27,16 @@
     <div class="content text-start mb-5 px-5 py-4" data-region="chooser-option-summary-content-container">
         <div data-region="moodle-net">
             <div class="overlay-icon-container z-index-1 d-none" data-region="spinner"></div>
-            <img class="w-25 mb-4" aria-hidden="true" src="{{{img}}}">
+            <img class="w-25 mb-4" alt="" aria-hidden="true" src="{{{img}}}">
             <p>{{#str}} instancedescription, tool_moodlenet {{/str}}</p>
+
+            {{! Removal warning - always visible when MoodleNet integration is enabled }}
+            <div class="alert alert-warning w-75 mx-auto mb-3" role="alert">
+                <strong>{{#str}}removalwarning_title, tool_moodlenet{{/str}}</strong>
+                <p class="mb-1">{{#str}}removalwarning_service, tool_moodlenet{{/str}}</p>
+                <p class="mb-0">{{#str}}removalwarning_feature, tool_moodlenet{{/str}}</p>
+            </div>
+
             <p class="w-75 mx-auto mb-1 mt-5">{{#str}} connectandbrowse, tool_moodlenet {{/str}}</p>
             <a class="btn btn-secondary d-block w-75 mx-auto mb-4"
                data-action="browse"
diff --git a/lang/en/admin.php b/lang/en/admin.php
index c37b2633feb..e5567a35a5a 100644
--- a/lang/en/admin.php
+++ b/lang/en/admin.php
@@ -966,6 +966,7 @@ $string['maxtimelimit'] = 'Maximum time limit';
 $string['maxtimelimit_desc'] = 'To restrict the maximum PHP execution time that Moodle will allow without any output being displayed, enter a value in seconds here. 0 means that Moodle default restrictions are used. If you have a front-end server with its own time limit, set this value lower to receive PHP errors in logs. Does not apply to CLI scripts.';
 $string['moodlebrandedapp'] = 'Branded Moodle app';
 $string['moodlebrandedappreference'] = 'Alternatively, get a <a href="https://moodle.com/branded-app/">Branded Moodle app</a> with your own custom branding.';
+$string['moodlenetremovalwarning'] = 'The MoodleNet service will be shut down on 20 April 2026. If you wish to continue using MoodleNet on your site, install the MoodleNet plugin from the <a href="https://moodle.org/plugins" target="_blank">Moodle plugins directory <i class="fa fa-external-link" role="img" aria-label="Opens in new window" title="Opens in new window"></i></a> and connect it to a self-hosted MoodleNet instance. Following this, the MoodleNet profile ID field will be removed; please migrate that data if you are using it for other purposes.';
 $string['noreplyaddress'] = 'No-reply address';
 $string['noreplydomain'] = 'No-reply and domain';
 $string['noreplydomaindetail'] = 'Settings for No-reply and configured domains';