They may be pre-set to bypass official Microsoft account sign-ins or include volume license keys (GVLK) for automatic activation. Source Risks:
Repacks disable Microsoft’s update mechanism. While this stops Microsoft from “calling home” to deactivate the product, it also means you will receive security patches. Over time, an unpatched Office suite is a vector for macro-based malware, DDE attacks, and RCE (Remote Code Execution) exploits. index of ms office 2016 64 bit repack
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