diff --git a/mod/bigbluebuttonbn/classes/instance.php b/mod/bigbluebuttonbn/classes/instance.php
index da1dad53af7..b0069f37c36 100644
--- a/mod/bigbluebuttonbn/classes/instance.php
+++ b/mod/bigbluebuttonbn/classes/instance.php
@@ -797,6 +797,9 @@ EOF;
      */
     public function get_welcome_message(): string {
         $welcomestring = $this->get_instance_var('welcome');
+        if (!config::get('welcome_editable') || empty($welcomestring)) {
+            $welcomestring = config::get('welcome_default');
+        }
         if (empty($welcomestring)) {
             $welcomestring = get_string('mod_form_field_welcome_default', 'bigbluebuttonbn');
         }
diff --git a/mod/bigbluebuttonbn/classes/local/config.php b/mod/bigbluebuttonbn/classes/local/config.php
index ae4dfba9dfb..f85819ea3b4 100644
--- a/mod/bigbluebuttonbn/classes/local/config.php
+++ b/mod/bigbluebuttonbn/classes/local/config.php
@@ -224,6 +224,7 @@ class config {
                'lockonjoinconfigurable_editable' => self::get('lockonjoinconfigurable_editable'),
                'lockonjoinconfigurable_default' => self::get('lockonjoinconfigurable_default'),
                'welcome_default' => self::get('welcome_default'),
+               'welcome_editable' => self::get('welcome_editable'),
         ];
     }
 
diff --git a/mod/bigbluebuttonbn/classes/settings.php b/mod/bigbluebuttonbn/classes/settings.php
index b5f81b22379..1d863f4db7b 100644
--- a/mod/bigbluebuttonbn/classes/settings.php
+++ b/mod/bigbluebuttonbn/classes/settings.php
@@ -193,6 +193,18 @@ class settings {
                 $item,
                 $settingsgeneral
             );
+            $settingsgeneral->add($item);
+            $item = new admin_setting_configcheckbox(
+                'bigbluebuttonbn_welcome_editable',
+                get_string('config_welcome_editable', 'bigbluebuttonbn'),
+                get_string('config_welcome_editable_description', 'bigbluebuttonbn'),
+                1,
+            );
+            $this->add_conditional_element(
+                'welcome_editable',
+                $item,
+                $settingsgeneral
+            );
         }
         return $settingsgeneral;
     }
diff --git a/mod/bigbluebuttonbn/lang/en/bigbluebuttonbn.php b/mod/bigbluebuttonbn/lang/en/bigbluebuttonbn.php
index 988914de4fc..6fa8a8ca150 100644
--- a/mod/bigbluebuttonbn/lang/en/bigbluebuttonbn.php
+++ b/mod/bigbluebuttonbn/lang/en/bigbluebuttonbn.php
@@ -239,6 +239,8 @@ $string['config_muteonstart_editable'] = 'Mute on start can be edited';
 $string['config_muteonstart_editable_description'] = 'Mute on start by default can be edited when the instance is added or updated.';
 $string['config_welcome_default'] = 'Default welcome message';
 $string['config_welcome_default_description'] = 'Replaces the default message setted up for the BigBlueButton server. The message can includes keywords  (%%CONFNAME%%, %%DIALNUM%%, %%CONFNUM%%) which will be substituted automatically, and also html tags like <b>...</b> or <i></i> ';
+$string['config_welcome_editable'] = 'Default welcome message is editable by teachers';
+$string['config_welcome_editable_description'] = 'Welcome message can be edited when the instance is added or updated';
 $string['config_default_messages'] = 'Default messages';
 $string['config_default_messages_description'] = 'Set message defaults for activities';
 
diff --git a/mod/bigbluebuttonbn/mod_form.php b/mod/bigbluebuttonbn/mod_form.php
index cff94b2be79..4d74bb01b04 100644
--- a/mod/bigbluebuttonbn/mod_form.php
+++ b/mod/bigbluebuttonbn/mod_form.php
@@ -317,10 +317,15 @@ class mod_bigbluebuttonbn_mod_form extends moodleform_mod {
      * @return void
      */
     private function bigbluebuttonbn_mform_add_block_room_room(MoodleQuickForm &$mform, array $cfg): void {
-        $field = ['type' => 'textarea', 'name' => 'welcome', 'data_type' => PARAM_CLEANHTML,
-            'description_key' => 'mod_form_field_welcome'];
-        $this->bigbluebuttonbn_mform_add_element($mform, $field['type'], $field['name'], $field['data_type'],
-            $field['description_key'], $cfg['welcome_default'], ['wrap' => 'virtual', 'rows' => 5, 'cols' => '60']);
+        $field = ['type' => 'hidden', 'name' => 'welcome', 'data_type' => PARAM_INT,
+            'description_key' => null];
+        if ($cfg['welcome_editable']) {
+            $field['type'] = 'textarea';
+            $field['data_type'] = PARAM_CLEANHTML;
+            $field['description_key'] = 'mod_form_field_welcome';
+            $this->bigbluebuttonbn_mform_add_element($mform, $field['type'], $field['name'], $field['data_type'],
+                $field['description_key'], $cfg['welcome_default'], ['wrap' => 'virtual', 'rows' => 5, 'cols' => '60']);
+        }
         $field = ['type' => 'hidden', 'name' => 'voicebridge', 'data_type' => PARAM_INT,
             'description_key' => null];
         if ($cfg['voicebridge_editable']) {
diff --git a/mod/bigbluebuttonbn/version.php b/mod/bigbluebuttonbn/version.php
index cde2191b569..56dd5f0d9d4 100644
--- a/mod/bigbluebuttonbn/version.php
+++ b/mod/bigbluebuttonbn/version.php
@@ -27,6 +27,6 @@
 defined('MOODLE_INTERNAL') || die;
 
 
-$plugin->version = 2021091408;
+$plugin->version = 2022021600;
 $plugin->requires = 2020061500;
 $plugin->component = 'mod_bigbluebuttonbn';