Click on the Help button ❔ next to the Settings ⚙️ button > select ' ℹ️ About' (1). A new dialog will pop up with the Booking Room Pro 'Unique Identifier' (2) Related ArticlesHow can I connect my Calendar Pro with Map Pro?How to use tags in Booking Room Pro?How to check the Calendar ID?How to get Parking Pro version?How to check the Parking Pro Unique Identifier (ID)?