For a CaptureNow license, the token is the seat that allows all the users of that computer to use a scanner with Perceptive Content.
Each scanner you connect to the Perceptive Content acquires a token provided by the CaptureNow license on the ImageNow Server. CaptureNow licenses are hardware specific, so if you need to move a scanner from one computer to another, or if a scanner is no longer used with that computer, you must release the token before using it with another scanner. Typically, a token is removed automatically when you remove the scanner from the Perceptive Content.