# How do I lock an appointment?

- Updated on Feb 27, 2023  
- Published on Oct 21, 2022

- 1 minute(s) read

Mobileforce FSM provides a tool called Lock Appointment, which is available from the **Schedule & Dispatch** page. This tool allows dispatchers to ensure that the scheduled time for the appointment is not rescheduled or modified (for example, change a 3 hour appointment to a 2 hour appointment).

Locking appointments can be useful in the following scenarios:

- Premiere clients who you want to prioritize.
- Appointments that have already been rescheduled on one or more occasions.
- Clients who have specific time windows which cannot be altered.
- Service tasks that are time sensitive. (For example, work that must take place between shifts or during off hours).

Locking is especially useful if you use the **Smart Route** tool, which automatically optimizes a technician's schedule based on geography and schedule. **Smart Route** will not modify any locked appointment.

To lock an appointment, do one of the following:

- Select the appointment in the Calendar pane to open the Appointment pop-up window, and click the **Lock** button.

- Select the Service Task in the Tasks pane, and click the **Lock** button.

To unlock an appointment, select the task in the Tasks pane, and click the **Unlock** button.