.. _lan-integrations: ======================= Trust CA - Integrations ======================= Instruct your end-user **application** to trust your Start9 server's Root CA. Certain services (such as NextCloud) offer file sync, calendar/contacts sync, or other connectivity you may want to use via a desktop or mobile application. Select from the list below for supported applications. .. caution:: You will first need to complete :ref:`lan-os` for your device before continuing. .. toctree:: :maxdepth: 1 Thunderbird