If you require fully featured offline productivity software without subscription fees, consider open-source suites that use no activation keys.

It creates an emulated KMS server on your local machine to trick the software into validating the license.

The Microsoft Toolkit 2.6.4 works by using a combination of algorithms and techniques to bypass the activation mechanisms of Windows and Office. The toolkit targets the software's licensing and activation processes, effectively tricking the system into thinking that the product has been activated with a valid product key.