Activate MS Office 2021 Guide This is working – 28 June 2022 Step 1. Go to Office directory: One of these will work depending on where the office is installed. cd /d %ProgramFiles(x86)%\Microsoft Office\Office16 cd /d %ProgramFiles%\Microsoft Office\Office16 Step 2. Check for any old licenses using the below command. This will show the last 5 digits of license/s if any (e.g 6MWKP). “cscript.exe ospp.vbs /dstatus” Step 3. Remove any old licenses: “cscript.exe ospp.vbs /unpkey:6MWKP” Rerun Step 1 to see if there are any other licenses. Else remove them using Step 2, replacing just the 5 digits of the license in it. Step 4. Install Office License for /f %x in ('dir /b ..\root\Licenses16\ProPlus2021VL_KMS*.xrm-ms') do cscript ospp.vbs /inslic:"..\root\Licenses16\%x" Step 5. Activate your Office using the KMS key cscript ospp.vbs /setprt:1688 cscript ospp.vbs /unpkey:6F7TH >nul cscript ospp.vbs /inpkey:FXYTK-NJJ8C-GB6DW-3DYQT-6F7TH cscript ospp.vbs /sethst:kms9.msguides.com cscript ospp.vbs /act cscript ospp.vbs /sethst:s8.uk.to Now open office applications. Dont open then till you finish doing Step 5 completely. This works perfectly! More information: Here is the KMS client key of Office 2021: FXYTK-NJJ8C-GB6DW-3DYQT-6F7TH. The Office 2021 KMS license is valid for 180 days only but it can be renewed automatically so you needn’t worry so much about the period.