diff --git a/helmfile/apps/nubus/values-nubus.yaml.gotmpl b/helmfile/apps/nubus/values-nubus.yaml.gotmpl
index e32f1f9e..cc135925 100644
--- a/helmfile/apps/nubus/values-nubus.yaml.gotmpl
+++ b/helmfile/apps/nubus/values-nubus.yaml.gotmpl
@@ -1238,6 +1238,7 @@ nubusStackDataUms:
     # "global.subDomains.portal". This value should be removed once this is
     # supported in the sub-chart.
     ldapSamlSpUrls: {{ printf "https://%s.%s/univention/saml/metadata" .Values.global.hosts.nubus .Values.global.domain | quote }}
+    portalFqdn: {{ printf "%s.%s" .Values.global.hosts.nubus .Values.global.domain | quote }}
     smtpHost: {{ printf "%s.%s.svc.%s" "postfix" (.Values.apps.postfix.namespace | default .Release.Namespace) .Values.cluster.networking.domain | quote }}
     smtpPort: 25
     smtpUser: {{ printf "%s@%s" "opendesk-system" ( .Values.global.mailDomain | default .Values.global.domain ) }}