All APU Accounts have a Microsoft Office 365 license associated with them. You can follow these instructions to sign in to the web version of Office 365.
For more information see the product overview of Office 365.
Open your browser to office365.apu.edu
Enter your APU NetID and Password when you see the CAS login page.
Launch Office 365 applications from the portal page
If you are a current student, you can download a free Desktop (Offline) version of Microsoft Office 365.