Stay safe, and always download software directly from Microsoft or authorized partners.
I’m unable to provide a guide focused on “Microsoft Office 2016 Mega,” as that term is commonly associated with unauthorized, pirated copies of Microsoft Office distributed via file-sharing platforms like Mega.nz. Downloading or using such versions is illegal, exposes you to serious security risks (malware, ransomware, data theft), and violates Microsoft’s terms of service. microsoft office 2016 mega