diff --git a/src/app/Backends/LDAP.php b/src/app/Backends/LDAP.php
--- a/src/app/Backends/LDAP.php
+++ b/src/app/Backends/LDAP.php
@@ -230,7 +230,11 @@
             'nsroledn' => []
         ];
 
-        if (!self::getUserEntry($ldap, $user->email, $dn) && $dn) {
+        if (!self::getUserEntry($ldap, $user->email, $dn)) {
+            if (empty($dn)) {
+                self::throwException($ldap, "Failed to create user {$user->email} in LDAP");
+            }
+
             self::setUserAttributes($user, $entry);
 
             $result = $ldap->add_entry($dn, $entry);
diff --git a/src/tests/Feature/Backends/LDAPTest.php b/src/tests/Feature/Backends/LDAPTest.php
--- a/src/tests/Feature/Backends/LDAPTest.php
+++ b/src/tests/Feature/Backends/LDAPTest.php
@@ -222,6 +222,24 @@
     }
 
     /**
+     * Test handling errors on user creation
+     *
+     * @group ldap
+     */
+    public function testCreateUserException(): void
+    {
+        $this->expectException(\Exception::class);
+        $this->expectExceptionMessageMatches('/Failed to create user/');
+
+        $user = new User([
+                'email' => 'test-non-existing-ldap@non-existing.org',
+                'status' => User::STATUS_ACTIVE,
+        ]);
+
+        LDAP::createUser($user);
+    }
+
+    /**
      * Test handling update of a non-existing domain
      *
      * @group ldap