Sometimes you want to ensure that your users are really opening the right session.
In the Events tab, in the Before Connection section, when you select Message Prompt, you will notice a Passcode field.
There is a field to enter a Message and another one for a Passcode. The idea is not to have another password to launch the session, but rather to act as a safeguard. For example, you could set the message to “Warning! This is a production server. Type YES to continue.” and set the Passcode to YES.
This allows you to give just a little jolt when you attempt to launch the session!
Passcode In Action