KMSAuto Net 2016 is a tool used for activating Microsoft products, particularly Windows and Office, without the need for a valid product key. It uses the Key Management Service (KMS) method, which is a legitimate activation method provided by Microsoft for organizations. However, using KMSAuto or similar tools for personal use or to activate software without a valid license can be considered a breach of Microsoft's terms and conditions.

While tools like KMSAuto Net 2016 v1.5.3 by Ratiborus [PORTABLE] might offer a shortcut to activating Microsoft products, the potential legal and safety risks are significant. Users should consider the implications and explore legitimate options for software activation.