This article describes how to determine the version of the Citrix license server.
To determine Citrix License product version, follow the steps below on the License server --
1.) Launch Registry Editor
2.) For 64-bit OS, navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Citrix\LicenseServer\Install
3.) For 32-bit OS, navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\LicenseServer\Install
3.) Look for REG_SZ called Version -- This key contains the License server version as shown in the screenshot below