If you are looking for the "portable" experience (using Office without a full local installation) or a free version, Microsoft provides several official paths:
If you're looking for a legitimate and secure way to access Microsoft Office 365, consider the following alternatives: descargar office 365 standard full activado portable
However, The lack of updates, potential for malware, and broken cloud features make it a liability. For a daily driver, sticking to a legitimate subscription or the free Office Online is the safer and more stable path. If you are looking for the "portable" experience