Then, what happens if you don't renew Microsoft Office?
If you don't renew, the software goes into "reduced functionality mode" in which you can view and print documents but you can't edit existing ones or create new ones. This is discussed in this ComputerWorld article, which cites this Microsoft FAQ.
Likewise, can you still use Word after it expires? For 30 days after your subscription expires, you will continue to have access to the Microsoft 365 portal, Office applications, and services such as email and SharePoint Online. After this 90-day period, your subscription is deprovisioned, and you will no longer have access to services or Office applications.
In this way, what happens when my Office 365 subscription expires?
If you see SUBSCRIPTION EXPIRED in the yellow warning bar, select Reactivate, and then select Buy to renew Office online. If you bought a new, unused Microsoft 365 product key from a retailer, select Enter Key.
Can I use Microsoft without paying?
The good news is, if you don't need the full suite of Microsoft 365 tools, you can access a number of its apps online for free -- including Word, Excel, PowerPoint, OneDrive, Outlook, Calendar and Skype.