Microsoft® Office Mobile for Android 4.0 and newer Microsoft® Office Mobile for iOS 6.1 and newer Microsoft® Office 2019 for macOS 10.13 and macOS 10.14 Microsoft® Office 2019 for Windows 8.1 and Windows 10 How long can it be used? Only while currently enrolled at UNT as a student or currently employed by UNT. Who is eligible for the free version of Office 365? Currently enrolled UNT students, faculty, and staff.