Before you start, ensure that the operating system version you’re running is Windows 10 or later. There is no way to install Office 2021 on Windows 8.1 or earlier.
Step 1: Download the exe file from: office 2021
Installing Microsoft Office 2021, takes several minutes, depending on your internet speed.
Once you complete the installation, all Office apps will run under a 7-day trial license.
Step 1: Type cmd in search box, right click on Command Prompt then select Run as administrator.
Step 2: Copy all below commands, right click to paste into cmd window at once then hit Enter.
if exist "C:\Program Files\Microsoft Office\Office16\ospp.vbs" cd /d "C:\Program Files\Microsoft Office\Office16"
if exist "C:\Program Files (x86)\Microsoft Office\Office16\ospp.vbs" cd /d "C:\Program Files (x86)\Microsoft Office\Office16"
for /f %x in ('dir /b ..\root\Licenses16\ProPlus2021VL_KMS*.xrm-ms') do cscript ospp.vbs /inslic:"..\root\Licenses16\%x"
cscript ospp.vbs /inpkey:FXYTK-NJJ8C-GB6DW-3DYQT-6F7TH
cscript ospp.vbs /sethst:kms.msgang.com
cscript ospp.vbs /act
pause
Microsoft Office 2021 was activated, and you can start using the applications without any restrictions or limitations.
Step 1: Right-click the Activator.bat file, then select Run as administrator (You can find it in the Office2021 zip file).
Finally, check the activation status of Microsoft Office 2021. Congratulations! The activation was completed successfully.
KMS credits: https://msgang.com