You should install the Isah License Server update on the server:
Use your browser to open the following directory on your network server: \IsahSetup_[RELEASNO]_Isah\[UPDATEPACKNO]_[VERSIONNO]\Server_Software\Isah_License_Server.
In this directory, double-click the file IsahLicenseServer.msi.
Note that multiple versions of the Isah License Server can be installed side by side, for instance while you are upgrading your system and need to keep your old databases running in an older version.
When prompted to do so, restart the computer at the end of the installation process. If you choose not to restart, you have to restart your computer later.
For more information, please refer to Installation Guide Isah License Server.