If you have added another patron/employee/volunteer as a participant to a task, they are set to To Be Invited or Accept by Default, depending on the default settings in Company Preferences.
Click here for more information on Company Preferences.When a task participant (or volunteer) is assigned to a task, if their status has been set to To Be Invited, they will appear in the Notifications window indicating that an Email needs to be sent to let them know about the meeting (or volunteer opportunity).
The information is loaded into their calendar on their individual machine. When they respond back to the meeting, Theatre Manager will update the meeting status.
Click here for more information on Notifications.