diff --git a/apps/files_external/lib/Lib/Auth/OpenStack/OpenStackV3.php b/apps/files_external/lib/Lib/Auth/OpenStack/OpenStackV3.php
index c8a78f52c4..ee6db4818a 100644
--- a/apps/files_external/lib/Lib/Auth/OpenStack/OpenStackV3.php
+++ b/apps/files_external/lib/Lib/Auth/OpenStack/OpenStackV3.php
@@ -46,6 +46,7 @@ class OpenStackV3 extends AuthMechanism {
 				new DefinitionParameter('domain', $l->t('Domain')),
 				(new DefinitionParameter('password', $l->t('Password')))
 					->setType(DefinitionParameter::VALUE_PASSWORD),
+				new DefinitionParameter('tenant', $l->t('Tenant name')),
 				new DefinitionParameter('url', $l->t('Identity endpoint URL'))
 			])
 		;
diff --git a/apps/files_external/lib/Lib/Backend/Swift.php b/apps/files_external/lib/Lib/Backend/Swift.php
index 25ed72337a..5ac4346b42 100644
--- a/apps/files_external/lib/Lib/Backend/Swift.php
+++ b/apps/files_external/lib/Lib/Backend/Swift.php
@@ -44,8 +44,7 @@ class Swift extends Backend {
 			->addParameters([
 				(new DefinitionParameter('service_name', $l->t('Service name')))
 					->setFlag(DefinitionParameter::FLAG_OPTIONAL),
-				(new DefinitionParameter('region', $l->t('Region')))
-					->setFlag(DefinitionParameter::FLAG_OPTIONAL),
+				new DefinitionParameter('region', $l->t('Region')),
 				new DefinitionParameter('bucket', $l->t('Bucket')),
 				(new DefinitionParameter('timeout', $l->t('Request timeout (seconds)')))
 					->setFlag(DefinitionParameter::FLAG_OPTIONAL),
diff --git a/lib/private/Files/ObjectStore/SwiftFactory.php b/lib/private/Files/ObjectStore/SwiftFactory.php
index 5944657640..7c8a1b995b 100644
--- a/lib/private/Files/ObjectStore/SwiftFactory.php
+++ b/lib/private/Files/ObjectStore/SwiftFactory.php
@@ -119,6 +119,10 @@ class SwiftFactory {
 		if (!isset($this->params['tenantName']) && isset($this->params['tenant'])) {
 			$this->params['tenantName'] = $this->params['tenant'];
 		}
+		if (isset($this->params['domain'])) {
+			$this->params['scope']['project']['name'] = $this->params['tenant'];
+			$this->params['scope']['project']['domain']['name'] = $this->params['domain'];
+		}
 		$this->params = array_merge(self::DEFAULT_OPTIONS, $this->params);
 
 		$cacheKey = $userName . '@' . $this->params['url'] . '/' . $this->params['container'];