In O365:

1. Click the waffle menu, then the Office 365 link. 

(Image of red square around waffle menu and red arrow pointing to Office 365 link) 

2. Click drop-down for Install Office. Click Other Install Options. 

(Image of red rectangle around Install Office drop down and red arrow pointing to Other install options) 

3. Click View Apps & Devices. 

(Image of red arrow and rectangle around View apps & devices) 

4. Click Install Office. 

(Image of red rectangle around Access and Install Office) 

(Technical Support > Software)