"Preactivated" and "free" versions of commercial software like Office Tab Enterprise (which is a paid productivity add-on for Microsoft Office) are typically unauthorized copies. Distributing or using such versions may violate copyright laws and software licensing agreements. It can also expose users to malware, data theft, or system instability.
While you are looking for a "preactivated" or "free" version, please note the following: Official Source : The developer of Office Tab Enterprise is ExtendOffice