Licensing VM (windows server) ESXI host

Hi,

So we recently get a datacenter license for two ESXI host that will allow us to install as many VM with windows server we want.

https://download.microsoft.com/download/7/C/E/7CED6910-C7B2-4196-8C55-208EE0B427E2/Windows_Server_2019_licensing_datashe…

Now, I checked vsphere but well there is nowhere to put a license for this, so I'm guessing is just like a contract that will said these 2 ESXI Host with serial number, are allowed to install as many VM. But then how do I activate the Windows Server SO that are inside of each VM?  I've been reading in a lot of parts that this should be automatically but is not or at least I haven't found anywhere how to do it.

I did check our Microsoft VLSC and find out recently we got a bunch of keys for Server 2008, 2008R2, 2012R2, 2016 and 2019 for all editions. My guess is that these keys are for activating the SO in the VM but another question raised.

Each pair of keys has a counter 0/45 and are MAK. So that means we can only activate 90 servers 2008, 2008R2..... and so on? Wasn't it suppose to be unlimited amount of VM?

Any help appreciated it.