Let’s clear up a common myth first: Microsoft doesn’t offer a simple "Download EXE" button for offline use on their standard consumer page. But don’t worry—there are official, safe ways to get the full installation files onto a USB drive.
The solution?
Here is exactly how to do it. If you manage more than one computer, skip the consumer portal. Use the Microsoft Office Deployment Tool (ODT) . This is a command-line tool that lets you download the exact version you need (32-bit or 64-bit) to a local folder. office 365 offline installer download