There is no official "portable" or "highly compressed" version of Microsoft 365 provided by Microsoft. Official desktop versions are designed to be fully installed on a local drive and require regular license check-ins.
These support DOCX, XLSX, PPTX and don’t require cracks or activation. portable microsoft office 365 highly compressed
The primary reason users seek out highly compressed versions is efficiency. There is no official "portable" or "highly compressed"
Verdict: While technically feasible, a legacy portable office suite is a security disaster waiting to happen. portable microsoft office 365 highly compressed