Flexera Licensing: Add this one to the pro column: generate licenses BEFORE an install
Now, in order to capture the HOST ID (used to be Server ID, I think, with the old licensing application), you run cpu_id.exe (be sure to pick the right one for your architecture ... there is an x86 and an x64 version) any time you want. It is not wrapped inside of the now old License Administrator which means you can execute it before an install. This makes even the longer (and somewhat variable although in my limited number 6.0 license requests even that seems to have stabilized) return time on a Flexera license moot ... if you're able to plan even just a little ahead.
Specifically, you can run cpu_id.exe on a server well before a planned install window, or even have IT do it if you don't have hands-on, and still generate a license file to be rolled up with the installation itself. Similarly, you can distribute the cpu_id.exe to a set of users ahead of an install window and generate all of the licenses once you have everyone's HOST ID ... in one session with the license app on ptc.com.