https://msguides.com/microsoft-software-products/office-2019.html

Download & Install Office 2019 http://officecdn.microsoft.com/pr/492350f6-3a01-4f97-b9c0-c7c6ddf67d60/media/en-us/ProPlus2019Retail.img

Open command prompt with admin rights and type

cd /d %ProgramFiles%\Microsoft Office\Office16

or

cd /d %ProgramFiles(x86)%\Microsoft Office\Office16

then each of the following lines individually

for /f %x in ('dir /b ..\root\Licenses16\ProPlus2019VL*.xrm-ms') do cscript ospp.vbs /inslic:"..\root\Licenses16\%x"
cscript ospp.vbs /setprt:1688
cscript ospp.vbs /unpkey:6MWKP >nul
cscript ospp.vbs /inpkey:NMMKJ-6RK4F-KMJVX-8D9MJ-6MWKP
cscript ospp.vbs /sethst:kms8.msguides.com
cscript ospp.vbs /act