I have setup a KMS server on my CentOS VPS, it allows me to significantly simply the process of activating Microsoft products on the corporate network.

Here are the installation steps:

Firstly, download the latest version of vlmcsd and unzip.

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# find latest version on https://github.com/fonoxy/vlmcsd/releases/ or use https://home.nerdtown.cc/kms/files/binaries.tar.gz 
wget https://github.com/fonoxy/vlmcsd/releases/download/svn1113/binaries.tar.gz
tar -zxvf binaries.tar.gz
# according your OS and CPU type
cd binaries/Linux/intel/static/

Startup vlmcsd with command:

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./vlmcsd-x64-musl-static -L 0.0.0.0:xxxx
# if you not use -L, default port is 1688
# ./vlmcsd-x64-musl-static -L 0.0.0.0:16882

Just use the IP+Port is all right, certainly you can also bind domain by Nginx forward.

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server {
        listen       80;
        server_name  kms.example.com;
        location ^~ / {
            proxy_pass http://127.0.0.1:1688/;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
        }
    }

Secondly check availability.

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# other port ./vlmcs-x64-musl-static 0.0.0.0:16882
# default
$ ./vlmcs-x64-musl-static
Connecting to 0.0.0.0:1688 ... successful
Sending activation request (KMS V6) 1 of 1  -> 03612-00206-566-464396-03-1103-14393.0000-2672021 (3A1C049600B60076)

On Windows open CMD, enter \binaries\Windows\intel directory.

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vlmcs-Windows-x86.exe [IP or domain]:[Port]

Finally activate Windows/Office

Find the Vol key that corresponds to Windows or Office (make sure the Office is Vol version).

Windows

Install the key you find above:

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slmgr /ipk xxxxx-xxxxx-xxxxx-xxxxx-xxxxx

Set KMS server：

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slmgr /skms [IP or domain]:[Port number]

Activate OS：

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slmgr /ato

Office

Go to the Office installation directory, for example the default for 64-bit Office 2016 is:

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C:\Program Files\Microsoft Office\Office16

Install the key you find above:

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cscript ospp.vbs /inpkey:xxxxx-xxxxx-xxxxx-xxxxx-xxxxx

Run CMD with administrator, and registry KMS server address:

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cscript ospp.vbs /sethst:[domain]
# if you use other port, set ip and port separately
# cscript ospp.vbs /sethst:[IP]
# cscript ospp.vbs /setprt:[Port]

Activate Office：

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cscript ospp.vbs /act

View activation info:

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cscript ospp.vbs /dstatus

Registry service

The KMS method of activation is valid for 180 days, so keep the vlmcsd service running, it will request a renewal automatically.

Create a vlmcsd.service file and edit.

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[Unit]
Description=KMS Server By vlmcsd
After=network.target

[Service]
Type=forking
PIDFile=/var/run/vlmcsd.pid
# ExecStart=/home/nathan/app/binaries/Linux/intel/static/vlmcsd-x64-musl-static -L 0.0.0.0:16882 -p /var/run/vlmcsd.pid
ExecStart=/binaries/Linux/intel/static/vlmcsd-x64-musl-static -p /var/run/vlmcsd.pid
ExecStop=/bin/kill -HUP $MAINPID
PrivateTmp=true

[Install]
WantedBy=multi-user.target

Configure vlmcsd as a system service.

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cp vlmcsd.service /etc/systemd/system/

Then you can Manage vlmcsd service with systemctl.

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# reload 
systemctl daemon-reload
# Turn on boot up
systemctl enable vlmcsd
# startup
systemctl start vlmcsd
# running info
systemctl status vlmcsd