All commands below should be run with the administrator privileges.

Change type of Windows edition:

slmgr /ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX

Available edition keys: https://docs.microsoft.com/en-us/windows-server/get-started/kms-client-activation-keys

Set KMS server:

slmgr /skms example.com

Examples:

kms.myftp.org
kms.03k.org
kms8.MSGuides.com
kms9.MSGuides.com
kms.digiboy.ir
hq1.chinancce.com
kms.xspace.in
xykz.f3322.org
kms.lotro.cc
kms.chinancce.com
kms.shuax.com
zh.us.to
kms.srv.crsoo.com
kms.aglc.cc
3rss.vicp.net:20439
222.76.251.188
franklv.ddns.net
heu168.6655.la
skms.ddns.net
54.223.212.31
kms.cnlic.com
kms.ddns.net
k.zpale.com
m.zpale.com
mvg.zpale.com
kensol263.imwork.net:1688
kms.msguides.com

Activate using selected KMS server:

slmgr /ato

Сheck if the system is activated or not:

slmgr /dli

Display information about activation:

slmgr /dlv

Show license expiration date:

slmgr /xpr