IT admins can save the installer to a USB drive or local network share to update multiple workstations quickly.
If you live in a rural area with DSL (1-3 Mbps) or rely on mobile hotspots, the 5GB download of Office 365 will consume your monthly data cap and take hours. The offline installer moves that download to a public library or office with fast Wi-Fi, allowing you to install at home in minutes. offline installer office