follow the steps below:
Visit https://portal.office.com/account and select Sign In
Login with your RCC email address and click Next
Enter your RCC email address password
Under the Office apps & devices section, Click on Install Office
OfficeSetup.exe will download
when the download is complete, open file or double-click the file to run the OfficeSetup.exe file
This process could take between 10 to 30 minutes based on your Internet connection.
Once you see this dialog box your Office365 software installation has successfully completed