To bring up the "License" dialog do the following:

1. Right-click on the Server icon,, in the System Tray.  If you do not see the icon, please see the article Why can't I see the Intelli-Site icons in the System Tray?
2. Click "Open...".  The "Server Status" window will appear.
3. In the menu bar, select "File" -> "Update Configuration".  The "License" dialog will appear.

This is where you will enter the license after you have received it from OSSI.

If you don't already have a license, please read How do I obtain an Intelli-Site license?