diff --git a/application/Espo/Core/Utils/SystemUser.php b/application/Espo/Core/Utils/SystemUser.php
index 2bc083b590..2519b83786 100644
--- a/application/Espo/Core/Utils/SystemUser.php
+++ b/application/Espo/Core/Utils/SystemUser.php
@@ -42,11 +42,23 @@ class SystemUser
     private const ID = 'system';
     private const UUID = 'ffffffff-ffff-ffff-ffff-ffffffffffff';
 
-    private bool $isUuid;
+    private string $id;
 
-    public function __construct(Metadata $metadata)
+    public function __construct(Metadata $metadata, Config $config)
     {
-        $this->isUuid = $metadata->get(['app', 'recordId', 'dbType']) === 'uuid';
+        $id = $config->get('systemUserId');
+
+        if ($id) {
+            $this->id = $id;
+
+            return;
+        }
+
+        $isUuid = $metadata->get(['app', 'recordId', 'dbType']) === 'uuid';
+
+        $this->id = $isUuid ?
+            self::UUID :
+            self::ID;
     }
 
     /**
@@ -54,8 +66,6 @@ class SystemUser
      */
     public function getId(): string
     {
-        return $this->isUuid ?
-            self::UUID :
-            self::ID;
+        return $this->id;
     }
 }
diff --git a/application/Espo/Resources/metadata/app/config.json b/application/Espo/Resources/metadata/app/config.json
index a25be59eb7..8ba2f6d649 100644
--- a/application/Espo/Resources/metadata/app/config.json
+++ b/application/Espo/Resources/metadata/app/config.json
@@ -13,6 +13,10 @@
         "emailKeepParentTeamsEntityList"
     ],
     "params": {
+        "systemUserId": {
+            "level": "admin",
+            "readOnly": true
+        },
         "smtpPassword": {
             "level": "internal"
         },
diff --git a/application/Espo/Tools/App/AppService.php b/application/Espo/Tools/App/AppService.php
index 547d1b51e3..1b836d7bb0 100644
--- a/application/Espo/Tools/App/AppService.php
+++ b/application/Espo/Tools/App/AppService.php
@@ -30,6 +30,7 @@
 namespace Espo\Tools\App;
 
 use Espo\Core\Authentication\Util\MethodProvider as AuthenticationMethodProvider;
+use Espo\Core\Utils\SystemUser;
 use Espo\Entities\DashboardTemplate;
 use Espo\Entities\EmailAccount as EmailAccountEntity;
 use Espo\Entities\InboundEmail as InboundEmailEntity;
@@ -67,7 +68,8 @@ class AppService
         private Preferences $preferences,
         private FieldUtil $fieldUtil,
         private Log $log,
-        private AuthenticationMethodProvider $authenticationMethodProvider
+        private AuthenticationMethodProvider $authenticationMethodProvider,
+        private SystemUser $systemUser
     ) {}
 
     /**
@@ -145,6 +147,7 @@ class AppService
             'timeZoneList' => $timeZoneList,
             'auth2FARequired' => $auth2FARequired,
             'logoutWait' => $logoutWait,
+            'systemUserId' => $this->systemUser->getId(),
         ];
 
         /** @var array<string, array<string, mixed>> $map */
diff --git a/client/src/views/email/record/detail.js b/client/src/views/email/record/detail.js
index 504c83e011..c5ea29e346 100644
--- a/client/src/views/email/record/detail.js
+++ b/client/src/views/email/record/detail.js
@@ -57,7 +57,7 @@ define('views/email/record/detail', ['views/record/detail'], function (Dep) {
 
             if (status === 'Archived') {
                 if (
-                    this.model.get('createdById') === 'system' ||
+                    this.model.get('createdById') === this.getHelper().getAppParam('systemUserId') ||
                     !this.model.get('createdById') || this.model.get('isImported')
                 ) {
                     isRestricted = true;
diff --git a/client/src/views/notification/items/base.js b/client/src/views/notification/items/base.js
index 32680579ff..f9fad5e954 100644
--- a/client/src/views/notification/items/base.js
+++ b/client/src/views/notification/items/base.js
@@ -92,7 +92,7 @@ define('views/notification/items/base', ['view'], function (Dep) {
             let id = this.userId;
 
             if (this.isSystemAvatar || !id) {
-                id = 'system';
+                id = this.getHelper().getAppParam('systemUserId');
             }
 
             return this.getHelper().getAvatarHtml(id, 'small', 20);
diff --git a/client/src/views/stream/note.js b/client/src/views/stream/note.js
index 9879e29bef..2a9480791b 100644
--- a/client/src/views/stream/note.js
+++ b/client/src/views/stream/note.js
@@ -221,7 +221,7 @@ define('views/stream/note', ['view'], function (Dep) {
             let id = this.model.get('createdById');
 
             if (this.isSystemAvatar) {
-                id = 'system';
+                id = this.getHelper().getAppParam('systemUserId');
             }
 
             return this.getHelper().getAvatarHtml(id, 'small', 20);
diff --git a/tests/integration/Espo/Settings/AccessTest.php b/tests/integration/Espo/Settings/AccessTest.php
index 3d61348230..c223295412 100644
--- a/tests/integration/Espo/Settings/AccessTest.php
+++ b/tests/integration/Espo/Settings/AccessTest.php
@@ -29,6 +29,7 @@
 
 namespace tests\integration\Espo\Settings;
 
+use Espo\Entities\User;
 use Espo\Tools\App\SettingsService;
 
 class AccessTest extends \tests\integration\Core\BaseTestCase
@@ -98,7 +99,7 @@ class AccessTest extends \tests\integration\Core\BaseTestCase
     {
         $this->createUser([
             'userName' => 'admin-tester',
-            'type' => 'admin'
+            'type' => 'admin',
         ]);
 
         $this->auth('admin-tester');
@@ -115,4 +116,23 @@ class AccessTest extends \tests\integration\Core\BaseTestCase
         $this->assertTrue(property_exists($data, 'jobPeriod'));
         $this->assertFalse(property_exists($data, 'cryptKey'));
     }
+
+    public function testReadOnly(): void
+    {
+        $this->createUser([
+            'userName' => 'admin-tester',
+            'type' => User::TYPE_ADMIN,
+        ]);
+
+        $this->auth('admin-tester');
+        $this->setApplication($this->createApplication());
+
+        $this->getInjectableFactory()
+            ->create(SettingsService::class)
+            ->setConfigData((object) [
+                'systemUserId' => 'test'
+            ]);
+
+        $this->assertNull($this->getConfig()->get('systemUserId'));
+    }
 }