diff --git a/helmfile/apps/open-xchange/values-openxchange.yaml.gotmpl b/helmfile/apps/open-xchange/values-openxchange.yaml.gotmpl
index 18556778..a3142731 100644
--- a/helmfile/apps/open-xchange/values-openxchange.yaml.gotmpl
+++ b/helmfile/apps/open-xchange/values-openxchange.yaml.gotmpl
@@ -399,6 +399,7 @@ appsuite:
       com.openexchange.showAdmin: "false"
       # Various Mail settings
       com.openexchange.mail.deleteDraftOnTransport: "true"
+      com.openexchange.capability.document_preview_xrechnung: "true"
       # PDF Export
       com.openexchange.capability.mail_export_pdf: "true"
       com.openexchange.mail.exportpdf.gotenberg.enabled: "true"