With a Microsoft Perpetual CSP software license you can install, display or use any version of a software product, not only simplifying licensing options but giving you the flexibility you need to make a transition to the cloud.
Replacing the Open Program, with Perpetual Licensing in CSP you only have to pay for a software license once and you can use it for as long as you want.
For example, you can purchase a version of Office 2019, install the software and continue to use the software even after Microsoft makes it ‘End-Of-Life’ (EOL) and is no longer supported.