If you’ve lost your key but previously purchased Office 2013:
Even if Office came with a trial key, overwrite it with the public GVLK. Run:
cscript ospp.vbs /inpkey:YC7DK-G2NP3-2QQC3-J6H88-GVGXT
You should see: "Product key installed successfully".
Try running Command Prompt as Administrator and use: how to activate ms office 2013 without product key using cmd
cd "C:\Program Files\Microsoft Office\Office15"
cscript ospp.vbs /inpkey:XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
cscript ospp.vbs /act
(Replace X's with your actual product key)
Run the standard activation command:
cscript ospp.vbs /act
Unless you have a real KMS server on your network, you will see: "Product activation failed. ... 0x8007000B (An error in the application)" or "Key Management Service not available". If you’ve lost your key but previously purchased
cscript ospp.vbs /dstatus
You will see the remaining grace days (usually 30).
If your trial has expired or is close to expiring, you can reset the clock up to 5 times (totaling 180 days).
cscript ospp.vbs /rearm
You will see: "Microsoft Office rearm successful". Restart Outlook or Word, and the trial counter resets to 30 days. Even if Office came with a trial key,
Limitation: You can only use /rearm 5 times. After that, you truly need a license.
There is no official, legal method to activate Microsoft Office 2013 without a valid product key using Command Prompt or any other tool. Any online guide suggesting otherwise typically involves software cracks, Key Management Service (KMS) emulation (unauthorized), or volume license misuse, all of which violate Microsoft’s terms of service.