If you have a legitimate copy, Microsoft still allows activation through authorized channels:
: Tools like LibreOffice or Google Docs provide similar functionality to Office 2010 for free, without the security risks of using pirated activators.
in October 2020, meaning it no longer receives security updates, making its use—regardless of activation status—a security liability.
The use of such activation tools can be against the terms of service of Microsoft products. Microsoft's terms and conditions state that software activation is meant to be done through official channels. Using third-party tools to bypass activation can violate these terms.