Well, just because the end-user (the corporate user) will not be seeing a UI or will not be entering the product key personally, doesn't mean there won't be someone doing the installation (namely, the admin).
So, it's really up to you. TurboActivate or TurboFloat are options available. It depends on your needs and your customers' needs. Here's a good article on the benefits and downsides of each: https://wyday.com/limelm/help/licensing-types/