Final answer:
When you deactivate a device with Microsoft Office 365 ProPlus, you can still view the installed apps on that device.
Step-by-step explanation:
When you deactivate a device where Microsoft Office 365 ProPlus is installed, you can still view the installed Office 365 apps on that deactivated device.
However, you cannot use those apps until you reactivate Office 365 ProPlus on the same device or install it on another device.