KMS activations are not permanent. They last for 180 days, at which point the software must "check in" with the server again to renew the lease. The Risks and Security Concerns
If you've purchased a product key or have access to one through your organization: Activar office 2010 con mini-kms activator 1.2 33
Cracked versions of Office often fail to receive critical security updates. This leaves your documents and your computer vulnerable to exploits that Microsoft has already patched in legitimate versions. Modern Alternatives KMS activations are not permanent