diff --git a/application/Espo/Core/Portal/Utils/Url.php b/application/Espo/Core/Portal/Utils/Url.php
index c10bbd0176..6a98e023c3 100644
--- a/application/Espo/Core/Portal/Utils/Url.php
+++ b/application/Espo/Core/Portal/Utils/Url.php
@@ -33,6 +33,12 @@ class Url
 {
     public static function detectPortalId() : ?string
     {
+        $portalId = $_SERVER['ESPO_PORTAL_ID'] ?? null;
+
+        if ($portalId) {
+            return $portalId;
+        }
+
         $url = $_SERVER['REQUEST_URI'];
 
         $portalId = explode('/', $url)[count(explode('/', $_SERVER['SCRIPT_NAME'])) - 1] ?? null;
@@ -41,57 +47,61 @@ class Url
             $portalId = null;
         }
 
-        if (!isset($portalId)) {
-            $url = $_SERVER['REDIRECT_URL'] ?? $url;
-
-            $portalId = explode('/', $url)[count(explode('/', $_SERVER['SCRIPT_NAME'])) - 1] ?? null;
+        if ($portalId) {
+            return $portalId;
         }
 
+        $url = $_SERVER['REDIRECT_URL'] ?? null;
+
+        if (!$url) {
+            return null;
+        }
+
+        $portalId = explode('/', $url)[count(explode('/', $_SERVER['SCRIPT_NAME'])) - 1] ?? null;
+
         return $portalId;
     }
 
-    public static function detectUrl() : string
+    protected static function detectIsCustomUrl() : bool
     {
-        $url = $_SERVER['REQUEST_URI'];
-
-        $portalId = explode('/', $url)[count(explode('/', $_SERVER['SCRIPT_NAME'])) - 1] ?? null;
-
-        if (strpos($url, '=') !== false) {
-            $portalId = null;
-        }
-
-        if (!isset($portalId)) {
-            return $_SERVER['REDIRECT_URL'] ?? $url;
-        }
-
-        return $url;
+        return (bool) ($_SERVER['ESPO_PORTAL_IS_CUSTOM_URL'] ?? false);
     }
 
-    public static function normalizeUrl(string $url) : string
+    public static function detectIsInPortalDir() : bool
     {
-        $urlParts = explode('?', $url);
+        $isCustomUrl = self::detectIsCustomUrl();
 
-        if (substr($urlParts[0], -1) === '/') {
-            return $url;
+        if ($isCustomUrl) {
+            return false;
         }
 
-        $url = $urlParts[0] . '/';
-
-        if (count($urlParts) > 1) {
-            $url .= '?' . $urlParts[1];
-        }
-
-        return $url;
-    }
-
-    public static function detectIsInDir() : bool
-    {
         $url = $_SERVER['REQUEST_URI'];
 
         $a = explode('?', $url);
 
         $url = rtrim($a[0], '/');
 
-        return strpos($url, '/') !== false;
+        return strpos($url, '/portal') !== false ;
+    }
+
+    public static function detectIsInPortalWithId() : bool
+    {
+        if (!self::detectIsInPortalDir()) {
+            return false;
+        }
+
+        $url = $_SERVER['REQUEST_URI'];
+
+        $a = explode('?', $url);
+
+        $url = rtrim($a[0], '/');
+
+        $folders = explode('/', $url);
+
+        if (count($folders) > 1 && $folders[count($folders) - 2] === 'portal') {
+            return true;
+        }
+
+        return false;
     }
 }
diff --git a/application/Espo/EntryPoints/Portal.php b/application/Espo/EntryPoints/Portal.php
index 75f6cc6b4f..bb244104c6 100644
--- a/application/Espo/EntryPoints/Portal.php
+++ b/application/Espo/EntryPoints/Portal.php
@@ -41,6 +41,7 @@ use Espo\Core\{
     Utils\Config,
     Portal\Application as PortalApplication,
     Portal\ApplicationRunners\Client,
+    Portal\Utils\Url,
     Api\Request,
     Api\Response,
 };
@@ -64,26 +65,14 @@ class Portal implements EntryPoint
     {
         $data = $data ?? (object) [];
 
-        $id = $request->get('id') ?? $data->id ?? null;
+        $id = $data->id ?? Url::detectPortalId();
 
         if (!$id) {
-            $url = $_SERVER['REQUEST_URI'];
+            $id = $this->config->get('defaultPortalId');
+        }
 
-            $id = explode('/', $url)[count(explode('/', $_SERVER['SCRIPT_NAME'])) - 1];
-
-            if (!isset($id)) {
-                $url = $_SERVER['REDIRECT_URL'];
-
-                $id = explode('/', $url)[count(explode('/', $_SERVER['SCRIPT_NAME'])) - 1];
-            }
-
-            if (!$id) {
-                $id = $this->config->get('defaultPortalId');
-            }
-
-            if (!$id) {
-                throw new NotFound();
-            }
+        if (!$id) {
+            throw new NotFound("Portal ID not detected.");
         }
 
         $application = new PortalApplication($id);
diff --git a/portal/index.php b/portal/index.php
index 21bd113156..76bac869d4 100644
--- a/portal/index.php
+++ b/portal/index.php
@@ -41,19 +41,10 @@ if (!$app->isInstalled()) {
     exit;
 }
 
-$url = Url::detectUrl();
-$normalizedUrl = Url::normalizeUrl($url);
-
-if ($url !== $normalizedUrl) {
-    header("Location: " . $normalizedUrl);
-
-    exit;
-}
-
-if (Url::detectIsInDir()) {
+if (Url::detectIsInPortalDir()) {
     $basePath = '../';
 
-    if (Url::detectPortalId()) {
+    if (Url::detectIsInPortalWithId()) {
         $basePath = '../../';
     }