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windows 2012 r2 standard  licensing re hyper-v

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Last Modified: 2016-06-10
have windows 2012 r2 standard , still in evaluation mode.
few weeks left on 2012 eval. ts eval has expired.
hardware has a single 4 core cpu, expansion space for 1 additional cpu

active directory.  dozen xppro workstations using 2012  file shares.
have three xppro guest-os,  used concurently   operating in hyper-v.
all three guests are domain members of another windows server on the lan.
plan to migrate those three to be domain members of the AD on the 2012 hyper-v host
and expect to add a few more guest-os instances   (LEGACY users), also  concurrent use
 what other licenses - windows cals-,ts cals , 2012 r2 ,etc - are needed for the xppro/w7pro guest-os use?

thanks
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Commented:
thanks, some of the fog has lifted.

re: windows cal and ts cals and ignoring the user/device choice:
may not have been clear re guest os use via rdp
evaluation period for the os is 180 days, eval period for terminal services is 120 days

the evaluation for the terminal services trial license should be expired, it counted down to zero, a month ago, but currently allows access using rdp.
all three guest os can be simultanously in use via separate rdp sessions.

accessing a guest os on the 2012 r2 standard OS requires a windows cal
( honor system - purchased only) ?
using rdp to access that guest os would also require a ts cal installed on the 2012 server, when the server is permanently licensed ?

should add that all 2012 server firewalls are disabbled while testing.

anyone used the evaluation period close to it's expiration ?
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now the  narrow  --server license/activation issue--
confusion arises from the "VM license" phrase and the "run any number of VMs"
"Hyper-V doesn't require licenses to run any number of VMs, but the guest OS installed MAY require a license"
"Standard includes TWO VM licenses  per copy for use on TWO CPUs."

2012 r2 standard allows unlimited number of VM instances.
OSes that require license/activation to function must meet that requirement.
period. installed in a VM wrapper as a guest os doesn't change that.

2012 r2 standard allows three install/activations
one directly on the hardware, and two each, wrapped in a VM as guest on that SAME hardware/host.
(the VMs are not licensed, the os installs require a license)

is this correct ?

ignoring for now, the CPU/core refinements, and the Datacenter version.  
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thanks again
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