diff --git a/public/admin/tool/moodlenet/classes/profile_manager.php b/public/admin/tool/moodlenet/classes/profile_manager.php
index f6715a008ef..0f541f9a7ad 100644
--- a/public/admin/tool/moodlenet/classes/profile_manager.php
+++ b/public/admin/tool/moodlenet/classes/profile_manager.php
@@ -169,6 +169,33 @@ class profile_manager {
         return 'moodlenetprofile';
     }
 
+    /**
+     * Create MoodleNet user profile fields (category and text field).
+     * This method is called during plugin installation to ensure the required
+     * profile field exists from the start.
+     */
+    public static function create_moodlenet_user_profile_fields(): void {
+        global $DB;
+
+        // This checks if the category and field already exist before creating them.
+        if (!self::check_profile_category()) {
+            $categoryid = self::create_user_profile_category();
+            self::create_user_profile_text_field($categoryid);
+        } else {
+            // Category exists, get its ID and check if field exists.
+            $category = $DB->get_record('user_info_category', [
+                'name' => self::get_category_name(),
+            ]);
+
+            $profilefield = $DB->record_exists('user_info_field', [
+                'shortname' => self::get_profile_field_name(),
+                'categoryid' => $category->id,
+            ]);
+            if (!$profilefield) {
+                self::create_user_profile_text_field($category->id);
+            }
+        }
+    }
 
     /**
      * Create a user profile field to hold the moodlenet profile information.
@@ -194,7 +221,7 @@ class profile_manager {
             'forceunique' => 1,
             'visible' => 2,
             'param1' => 30,
-            'param2' => 2048
+            'param2' => 2048,
         ];
         $profileclass->define_save($data);
     }
diff --git a/public/admin/tool/moodlenet/classes/task/post_install.php b/public/admin/tool/moodlenet/classes/task/post_install.php
index 55f2ca13881..4b735011b3e 100644
--- a/public/admin/tool/moodlenet/classes/task/post_install.php
+++ b/public/admin/tool/moodlenet/classes/task/post_install.php
@@ -31,5 +31,11 @@ namespace tool_moodlenet\task;
 class post_install extends \core\task\adhoc_task {
     public function execute() {
         set_config('activitychooseractivefooter', 'tool_moodlenet');
+
+        // Create the MoodleNet custom profile field for new installations.
+        // This checks if the category and field already exist before creating them.
+        if (!PHPUNIT_TEST) {
+            \tool_moodlenet\profile_manager::create_moodlenet_user_profile_fields();
+        }
     }
 }
diff --git a/public/admin/tool/moodlenet/lang/en/tool_moodlenet.php b/public/admin/tool/moodlenet/lang/en/tool_moodlenet.php
index dcb01c5184a..e00f07df79c 100644
--- a/public/admin/tool/moodlenet/lang/en/tool_moodlenet.php
+++ b/public/admin/tool/moodlenet/lang/en/tool_moodlenet.php
@@ -53,8 +53,8 @@ $string['instanceplaceholder'] = 'a1b2c3d4e5f6-example@moodle.net';
 $string['invalidmoodlenetprofile'] = '$userprofile is not correctly formatted';
 $string['missinginvalidpostdata'] = 'The resource information from MoodleNet is either missing, or is in an incorrect format.
 If this happens repeatedly, please contact the site administrator.';
-$string['mnetprofile'] = 'MoodleNet profile';
-$string['mnetprofiledesc'] = '<p>Enter your MoodleNet profile details here to be redirected to your profile while visiting MoodleNet.</p>';
+$string['mnetprofile'] = 'MoodleNet profile ID';
+$string['mnetprofiledesc'] = 'Your MoodleNet profile ID links your MoodleNet profile with this site.';
 $string['moodlenetnotenabled'] = 'The MoodleNet integration must be enabled in Site administration / MoodleNet before resource imports can be processed.';
 $string['moodlenetsettings'] = 'MoodleNet inbound settings';
 $string['notification'] = 'You are about to import the content "{$a->name} ({$a->type})" into your site. Select the course in which it should be added, or <a href="{$a->cancellink}">cancel</a>.';
diff --git a/public/admin/tool/moodlenet/tests/profile_manager_test.php b/public/admin/tool/moodlenet/tests/profile_manager_test.php
index 8561bbb16ae..d7b0285fbb5 100644
--- a/public/admin/tool/moodlenet/tests/profile_manager_test.php
+++ b/public/admin/tool/moodlenet/tests/profile_manager_test.php
@@ -136,4 +136,48 @@ final class profile_manager_test extends \advanced_testcase {
         $fieldname = \tool_moodlenet\profile_manager::get_profile_field_name();
         $this->assertEquals($profilename, $userdata->{'profile_field_' . $fieldname});
     }
+
+    /**
+     * Test creation of MoodleNet user profile fields.
+     *
+     * @covers ::create_moodlenet_user_profile_fields
+     */
+    public function test_create_moodlenet_user_profile_fields(): void {
+        global $CFG, $DB;
+        $this->resetAfterTest();
+
+        require_once($CFG->dirroot . '/user/profile/lib.php');
+
+        $categoryname = \tool_moodlenet\profile_manager::get_category_name();
+        $fieldname = \tool_moodlenet\profile_manager::get_profile_field_name();
+
+        // Verify category and field don't exist initially.
+        $categorycount = $DB->count_records('user_info_category', ['name' => $categoryname]);
+        $this->assertEquals(0, $categorycount);
+        $fieldcount = $DB->count_records('user_info_field', ['shortname' => $fieldname]);
+        $this->assertEquals(0, $fieldcount);
+
+        // Call the method to create category and field.
+        \tool_moodlenet\profile_manager::create_moodlenet_user_profile_fields();
+
+        // Verify category was created.
+        $categorycount = $DB->count_records('user_info_category', ['name' => $categoryname]);
+        $this->assertEquals(1, $categorycount);
+        $category = $DB->get_record('user_info_category', ['name' => $categoryname]);
+        $categoryid = $category->id;
+
+        // Verify field was created in the correct category.
+        $fieldcount = $DB->count_records('user_info_field', [
+            'shortname' => $fieldname,
+            'categoryid' => $categoryid,
+        ]);
+        $this->assertEquals(1, $fieldcount);
+
+        // Verify the method is idempotent (can be called multiple times).
+        \tool_moodlenet\profile_manager::create_moodlenet_user_profile_fields();
+        $categorycount = $DB->count_records('user_info_category', ['name' => $categoryname]);
+        $this->assertEquals(1, $categorycount);
+        $fieldcount = $DB->count_records('user_info_field', ['shortname' => $fieldname]);
+        $this->assertEquals(1, $fieldcount);
+    }
 }