The current (activated) license number is available by two ways:
1. Log in to WCS web interface by URLwhere yourhost is WCS server name. Click "License" button
You can select and copy license number from page.
2. In SSH client (Putty for example) enter the following commands
The activation script will display current license number and will offer to deactivate it. Enter "no"
You can select and copy license number from terminal window.