Traditionally, the Office applications followed a lifecycle of five years each in mainstream and extended support. However, the situation is now more complicated because the apps are also limited in their use by being disconnected from the Microsoft 365 cloud services or when being run on an outdated Windows.
The post End of support for Office (2013, 2016, 2019): No Microsoft 365 access, and outdated OS versions first appeared on 4sysops.