Entitlements and customer IDs in a DTAP setup
The entitlements feature requires you to supply a customer ID, as provided by RWS Customer Support, with every Content Manager server and every Content Delivery microservice that is installed or upgraded. In a DTAP setup, each of the four environments in the setup (Development, Testing, Acceptance and Production) needs its own customer ID. So a DTAP setup needs four different customer IDs. Within each evironment, however, all Tridion Sites software components have the same customer ID.