To block Adobe-related domains using your system's hosts file, you need to redirect specific URLs to a non-existent IP address like
A typical blocking entry routes a domain to an invalid or local IP: Adobe Hosts File Block List
Many non-Adobe applications (video editors, PDF readers, even some games) rely on Adobe services for license checks. Your block list could break them. To block Adobe-related domains using your system's hosts
The hosts file is a text file on a computer that maps hostnames to IP addresses. It is used to override the default DNS resolution process, allowing users to manually specify the IP address of a website or service. Adobe has been using this file to block access to pirated versions of its software by redirecting users to a Adobe-controlled server. Adobe Hosts File Block List