Disable Inventation Emails

Hello NextcloudCommunity,

I am running an instance of Nextcloud in my RaspberryPi, which is only acessiable in my locale network. In this Maschine I have also the Calendar APP installed. But I would Like to disable these Emails which are sent when I add a Person to an event, because they cannot acces the links and I only use this feature for myself. Has anyone an idea how to do this?