Overview
You want to know the version of your Lithium servers.
Solution
You can go to your login page of the servers and the version is displayed at the bottom of the screen:
<supportagent>
The information can also be seen in the NewNet Customer Master Support sheet 2019-2021. The 2 columns Main Product Version and Other Versions Used have the required information.
Note that the previous way is the most reliable way to get the license information.
</supportagent>