ErrorInvalidLicense - how to fix?

Description of error code "ErrorInvalidLicense"

Domain: Exchange

Code: ErrorInvalidLicense

Type: Configuration error (You are often able to resolve this type of error.)

Description: The account (either meeting room or user) does not have a valid Exchange license. If you encounter the error on a meeting room's calendar (on the AskCody Add-ins, Room Displays, or Dashboard), please verify that the calendar type in Exchange is 'Resource'. If you encounter the error on a user's calendar, please verify that the user has a valid Microsoft Exchange license.