If the Sage 50 Connector is not already in the foreground, open it by right-clicking on the Connector tray icon usually found in the bottom left of the screen and selecting 'Open Sage 50 Connector'.
Click the 'License' link:
This will show the product (your company product name as set in the portal (documented here) and the user's license key (which is the company ID as found in the Codat portal when creating the company):
