Microsoft volume license for installation

As always, you should get the official answer from Microsoft.

Nonetheless, as I read the terms (not a lawyer here), you can MOVE the license every 90 days (or quicker in cases of emergencies).  You are still limited to one computer (a minimal host and 2 VMs, I believe) at a time.

If you are going to move your OS to other hardware every 90 days, you might as well use the trial version of the OS. A trial version should last you 180 days, and you can install it on more than one machine. Otherwise I don't really understand your Question and what it has to do with a VL. You can also reactivate other licenses every 90 days on other hardware provided you have disabled it on the previous hardware.

Besides that, how many licenses you get depend on the edition. Server Standard gives you 2 licenses, Essentials as far as I know only one, and datacenter as many as you need.

@rindi

It took quite a bit of effort on my part, but was eventually able to get a straight answer from Microsoft on the phone (with a link to back it up) that Server 2016 Essentials allows 2 VMs.  The link pointed was about 2016 without explicitly mentioning Essentials, but he insisted that Essentials was included.

my version is windows server 2012 standard R2  vl, can I install on 2 different server and activated?

but if like that I need to buy another 2012 VL, but I can use my same cals. is that ok?

if VPN connect branch and Head office consider a same network?
thanks

good