diff --git a/admin_manual/apps_management.rst b/admin_manual/apps_management.rst
index aedc711dc..b822a03e9 100644
--- a/admin_manual/apps_management.rst
+++ b/admin_manual/apps_management.rst
@@ -23,6 +23,9 @@ To see which apps are enabled go to your Apps page.
 Those apps are supported and developed by Nextcloud GmbH directly and
 have an **Featured**-tag. See :doc:`installation/apps_supported` for a list of supported apps.
 
+.. note:: Your Nextcloud server needs to be able to communicate with 
+          ``https://apps.nextcloud.com`` to list and download apps. Please make sure to whitelist this target in your firewall or proxy if necessary_.
+
 .. note:: To get access to work-arounds, long-term-support, priority bug fixing
           and custom consulting for supported apps, contact our `sales team <https://nextcloud.com/enterprise/>`_.