im running a NextcloudPi behind a Fritzbox. In order to have it accessible from the Internet portmapping is enabled.
I can add a federated user like <firstname.lastname@example.org:#portnumer> for sharing within a hosted nextcloud instance and do have access to the shared objects within the PI nextcloud instance behind the fritzbox. So thats fine.
Next step is to create circles. Adding a user in the form of <email@example.com:#portnumer> is not supported by the circles app.
However, without the portnumber the user cannot be found (obviously).
Is this a known problem? Any workaround you would suggest?