These installers often disable "Office Telemetry" or update services to prevent the software from checking its license status, which also prevents it from receiving official security updates.
If you need Microsoft Office 2021, it is safer to use official deployment methods that ensure you have the latest, clean files directly from Microsoft servers.
If you are looking for a free solution without the risks of cracked software, LibreOffice or FreeOffice provide high compatibility with .docx and .xlsx formats safely.
For most users, a Microsoft 365 subscription is the standard method to get the latest versions of Word, Excel, and PowerPoint with continuous updates.
This is the professional way to download the "Retail" or "LTSC" versions of Office 2021. You can configure your installation using the Office Customization Tool .