diff --git a/inc/admin/class-sunrise-admin-notice.php b/inc/admin/class-sunrise-admin-notice.php
new file mode 100644
index 0000000..d4b9955
--- /dev/null
+++ b/inc/admin/class-sunrise-admin-notice.php
@@ -0,0 +1,189 @@
+<?php
+/**
+ * Handles the SUNRISE constant check and notifications.
+ *
+ * @package WP_Ultimo
+ * @subpackage Admin
+ * @since 2.0.0
+ */
+
+namespace WP_Ultimo\Admin;
+
+use WP_Ultimo\Helpers\WP_Config;
+
+// Exit if accessed directly
+defined('ABSPATH') || exit;
+
+/**
+ * Handles the SUNRISE constant check and notifications.
+ *
+ * @since 2.0.0
+ */
+class Sunrise_Admin_Notice {
+
+    /**
+     * Singleton trait.
+     */
+    use \WP_Ultimo\Traits\Singleton;
+
+    /**
+     * Initializes the class.
+     *
+     * @since 2.0.0
+     * @return void
+     */
+    public function init() {
+
+        // Only show this in the network admin
+        if (!is_network_admin()) {
+            return;
+        }
+
+        // Add the admin notice
+        add_action('network_admin_notices', array($this, 'check_sunrise_constant'));
+
+        // Handle the AJAX request to update wp-config.php
+        add_action('wp_ajax_wu_update_sunrise_constant', array($this, 'handle_update_sunrise_constant'));
+    }
+
+    /**
+     * Checks if the SUNRISE constant is defined and shows a notice if not.
+     *
+     * @since 2.0.0
+     * @return void
+     */
+    public function check_sunrise_constant() {
+
+        // Check if SUNRISE is defined and true
+        if (defined('SUNRISE') && SUNRISE === true) {
+            return;
+        }
+
+        // Check if we can write to wp-config.php
+        $wp_config_path = WP_Config::get_instance()->get_wp_config_path();
+        $can_write = is_writable($wp_config_path);
+
+        ?>
+        <div class="notice notice-error is-dismissible">
+            <h3 style="margin-top: 0.5em;"><?php _e('Domain Mapping Not Active', 'wp-ultimo'); ?></h3>
+            <p>
+                <?php _e('WP Multisite WaaS domain mapping requires the <code>SUNRISE</code> constant to be defined and set to <code>true</code> in your wp-config.php file.', 'wp-ultimo'); ?>
+                <?php _e('Without this setting, domain mapping will not work correctly.', 'wp-ultimo'); ?>
+            </p>
+
+            <?php if ($can_write) : ?>
+                <p>
+                    <button id="wu-update-sunrise-constant" class="button button-primary">
+                        <?php _e('Add SUNRISE Constant to wp-config.php', 'wp-ultimo'); ?>
+                    </button>
+                    <span id="wu-sunrise-spinner" class="spinner" style="float: none; margin-top: 0;"></span>
+                    <span id="wu-sunrise-message" style="display: none; margin-left: 10px;"></span>
+                </p>
+                <script>
+                    jQuery(document).ready(function($) {
+                        $('#wu-update-sunrise-constant').on('click', function(e) {
+                            e.preventDefault();
+                            
+                            var $button = $(this);
+                            var $spinner = $('#wu-sunrise-spinner');
+                            var $message = $('#wu-sunrise-message');
+                            
+                            $button.prop('disabled', true);
+                            $spinner.addClass('is-active');
+                            
+                            $.ajax({
+                                url: ajaxurl,
+                                type: 'POST',
+                                data: {
+                                    action: 'wu_update_sunrise_constant',
+                                    nonce: '<?php echo wp_create_nonce('wu_update_sunrise_constant'); ?>'
+                                },
+                                success: function(response) {
+                                    $spinner.removeClass('is-active');
+                                    
+                                    if (response.success) {
+                                        $message.html(response.data.message).css('color', 'green').show();
+                                        setTimeout(function() {
+                                            window.location.reload();
+                                        }, 1500);
+                                    } else {
+                                        $button.prop('disabled', false);
+                                        $message.html(response.data.message).css('color', 'red').show();
+                                    }
+                                },
+                                error: function() {
+                                    $button.prop('disabled', false);
+                                    $spinner.removeClass('is-active');
+                                    $message.html('<?php _e('An unknown error occurred.', 'wp-ultimo'); ?>').css('color', 'red').show();
+                                }
+                            });
+                        });
+                    });
+                </script>
+            <?php else : ?>
+                <p>
+                    <?php _e('We cannot automatically update your wp-config.php file as it is not writable.', 'wp-ultimo'); ?>
+                    <?php _e('Please add the following line to your wp-config.php file:', 'wp-ultimo'); ?>
+                </p>
+                <p>
+                    <code style="display: block; padding: 10px; background: #f0f0f1; margin-bottom: 10px;">define('SUNRISE', true);</code>
+                </p>
+                <p>
+                    <?php printf(
+                        __('This line should be added right after the line with <code>%s</code>.', 'wp-ultimo'),
+                        '$table_prefix'
+                    ); ?>
+                    <?php _e('After adding this line, please refresh this page.', 'wp-ultimo'); ?>
+                </p>
+            <?php endif; ?>
+        </div>
+        <?php
+    }
+
+    /**
+     * Handles the AJAX request to update wp-config.php.
+     *
+     * @since 2.0.0
+     * @return void
+     */
+    public function handle_update_sunrise_constant() {
+
+        // Check nonce
+        if (!check_ajax_referer('wu_update_sunrise_constant', 'nonce', false)) {
+            wp_send_json_error(array(
+                'message' => __('Security check failed.', 'wp-ultimo')
+            ));
+            return;
+        }
+
+        // Check if SUNRISE is already defined
+        if (defined('SUNRISE') && SUNRISE === true) {
+            wp_send_json_success(array(
+                'message' => __('SUNRISE constant is already defined.', 'wp-ultimo')
+            ));
+            return;
+        }
+
+        // Try to update wp-config.php
+        $result = WP_Config::get_instance()->inject_wp_config_constant('SUNRISE', true);
+
+        if (is_wp_error($result)) {
+            wp_send_json_error(array(
+                'message' => $result->get_error_message()
+            ));
+            return;
+        }
+
+        if ($result === false) {
+            wp_send_json_error(array(
+                'message' => __('Failed to update wp-config.php. Try adding the constant manually.', 'wp-ultimo')
+            ));
+            return;
+        }
+
+        wp_send_json_success(array(
+            'message' => __('SUNRISE constant added successfully! Reloading...', 'wp-ultimo')
+        ));
+    }
+
+} 
\ No newline at end of file
diff --git a/inc/class-domain-mapping.php b/inc/class-domain-mapping.php
index 739e849..2108871 100644
--- a/inc/class-domain-mapping.php
+++ b/inc/class-domain-mapping.php
@@ -39,6 +39,41 @@ class Domain_Mapping {
 	 */
 	public $original_url = null;
 
+	/**
+	 * Initializes the Domain Mapping Class
+	 *
+	 * @since 2.0.0
+	 */
+	public function __construct() {
+
+		if ( ! \WP_Ultimo\Sunrise::should_startup()) {
+			return;
+		}
+
+		// Make sure we got loaded in the sunrise stage.
+		add_filter('pre_get_site_by_path', array($this, 'pre_get_site_by_path'), 10, 4);
+
+		add_action('template_redirect', array($this, 'disable_canonical_redirect'), 1);
+
+		add_filter('network_site_url', array($this, 'network_site_url'), 10, 3);
+
+		add_action('admin_init', array($this, 'load_sunrise_notification'));
+
+	}
+
+	/**
+	 * Load the SUNRISE constant check and notification.
+	 *
+	 * @since 2.0.0
+	 * @return void
+	 */
+	public function load_sunrise_notification() {
+		if (is_network_admin()) {
+			require_once wu_path('inc/admin/class-sunrise-admin-notice.php');
+			\WP_Ultimo\Admin\Sunrise_Admin_Notice::get_instance()->init();
+		}
+	}
+
 	/**
 	 * Runs on singleton instantiation.
 	 *
diff --git a/readme.txt b/readme.txt
index 39b9228..3064264 100644
--- a/readme.txt
+++ b/readme.txt
@@ -6,19 +6,93 @@ License: GPLv2
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 Contributors: aanduque, superdav42 
 
-The Complete Network Solution.
+The Complete Network Solution for transforming your WordPress Multisite into a Website as a Service (WaaS) platform.
 
 == Description ==
 
-WP Multisite WaaS
+WP Multisite WaaS helps you transform your WordPress Multisite installation into a powerful Website as a Service (WaaS) platform. This plugin enables you to offer website creation, hosting, and management services to your customers through a streamlined interface.
 
-The WordPress Multisite Website as a Service (Waas) plugin. Now community maintained.
+Now community maintained.
 
 == Installation ==
 
-1. Upload 'wp-multisite-waas' to the '/wp-content/plugins/' directory
-2. Activate the plugin through the 'Plugins' menu in WordPress
-3. Follow the step by step Wizard to set the plugin up
+There are two recommended ways to install WP Multisite WaaS:
+
+= Method 1: Using the pre-packaged release (Recommended) =
+
+1. Download the latest release ZIP from the [Releases page](https://github.com/superdav42/wp-multisite-waas/releases)
+2. Log in to your WordPress Network Admin dashboard
+3. Navigate to Plugins > Add New > Upload Plugin
+4. Choose the downloaded ZIP file and click "Install Now"
+5. Network Activate the plugin through the 'Plugins' menu in WordPress
+6. Follow the step by step Wizard to set the plugin up
+
+= Method 2: Using Git and Composer (For developers) =
+
+This method requires command-line access to your server and familiarity with Git and Composer.
+
+1. Clone the repository to your plugins directory:
+   ```
+   cd wp-content/plugins/
+   git clone https://github.com/superdav42/wp-multisite-waas.git
+   cd wp-multisite-waas
+   ```
+
+2. Install the required dependencies using Composer:
+   ```
+   composer install
+   ```
+
+3. Network Activate the plugin in your WordPress Network Admin dashboard
+4. Follow the setup wizard to complete the installation
+
+= Common Installation Issues =
+
+**"Failed opening required [...]/vendor/autoload_packages.php"**
+
+This error occurs when the required vendor files are missing. This typically happens when:
+- You've downloaded the repository directly from GitHub without using a release package
+- The composer dependencies haven't been installed
+
+Solution: Use the pre-packaged release from the [Releases page](https://github.com/superdav42/wp-multisite-waas/releases) or run `composer install` in the plugin directory.
+
+**"Cannot declare class ComposerAutoloaderInitWPUltimoDependencies, because the name is already in use"**
+
+This error usually occurs when updating from an older version of WP Ultimo or when multiple versions of the plugin are installed.
+
+Solution: Deactivate and remove any older versions of WP Ultimo or WP Multisite WaaS before activating the new version.
+
+**"Class 'WP_Ultimo\Database\Sites\Site_Query' not found"**
+
+This error can occur if the plugin's autoloader isn't properly loading all the necessary classes.
+
+Solution: Use the pre-packaged release from the [Releases page](https://github.com/superdav42/wp-multisite-waas/releases) which includes all required files.
+
+= Domain Mapping Requirements =
+
+For domain mapping functionality to work properly, you must have the `SUNRISE` constant defined in your wp-config.php file:
+
+1. Open your wp-config.php file (located in your WordPress root directory)
+2. Add the following line after the `$table_prefix` line:
+   ```php
+   define('SUNRISE', true);
+   ```
+3. Save the file
+
+If you don't add this constant, all mapped domains will redirect to your main site instead of the correct subsite.
+
+The plugin will display a notification in the Network Admin dashboard if the `SUNRISE` constant is not defined, with an option to add it automatically if your wp-config.php file is writable.
+
+== Requirements ==
+
+- WordPress Multisite 5.3 or higher
+- PHP 7.4.30 or higher
+- MySQL 5.6 or higher
+- HTTPS enabled (recommended for secure checkout)
+
+== Support ==
+
+For support, please open an issue on the [GitHub repository](https://github.com/superdav42/wp-multisite-waas/issues).
 
 == Upgrade Notice ==
 
@@ -384,7 +458,7 @@ Version 2.0.20 - Released on 2022-09-30
 * Added: Security mode to deactivate all plugins except WP Ultimo and mu-plugins at once and reactivate after disable;
 * Added: Allow customers to update the membership to plans and variations with different periods;
 * Added: Allow customers to select one of their sites when creating a new one;
-* Added: Error message when customers access the “add user” page over users limit;
+* Added: Error message when customers access the "add user" page over users limit;
 * Added: wu_return_url filter, allowing custom redirections after checkout process;
 * Improvement: New payments from manual gateway are now generated by current membership;
 * Improvement: Elementor compatibility on mapped sites;
@@ -463,8 +537,8 @@ Version 2.0.15 - Released on 2022-06-15
 * Added: Currency Saudi Riyal
 * Improvement: Removes unlisted countries from the billing address checkout field when using the "Restrict by country" option;
 * Improvement: Disables the "Restrict by country" toggle when saving the form without allowed countries;
-* Improvement: Improves the addition of billing address fields by allowing the removal of fields through the “wu_billing_address_fields” filter and avoiding error in the use of this filter;
-* Improvement: Checks if payment status is completed when building the cart to prevent error with Ultimo defining the cart as “retry”;
+* Improvement: Improves the addition of billing address fields by allowing the removal of fields through the "wu_billing_address_fields" filter and avoiding error in the use of this filter;
+* Improvement: Checks if payment status is completed when building the cart to prevent error with Ultimo defining the cart as "retry";
 * Improvement: Verifies if the cart has a future value to be paid to better handle downgrades;
 * Improvement: Checks if subscription is not already cancelled on Stripe and Stripe Checkout gateways before trying to cancel;
 * Improvement: Improvement: Changes stripe.js handlers to better code readability and to follow Stripe recommendations;
@@ -485,7 +559,7 @@ Version 2.0.15 - Released on 2022-06-15
 * Fix: SSO not working on wp-admin page with mapped domains;
 * Fix: Stripe saved cards not working;
 * Fix: Downgrade cart not being correctly built when new plan is not free;
-* Fix: Correctly define a cart as “retry” and postpone the payment verification when building it to prevent some errors on checkout validation process;
+* Fix: Correctly define a cart as "retry" and postpone the payment verification when building it to prevent some errors on checkout validation process;
 * Fix: Get the enable multiple membership value config from settings value;
 * Fix: Allow updates with current plan on trial period;
 * Fix: Stripe Checkout gateway id with wrong value on get_or_create_customer method;