---
title: "Set up automatic appointment reminders"
slug: "set-up-automatic-appointment-reminders"
updated: 2026-10-15T01:09:00Z
published: 2026-10-15T01:09:00Z
canonical: "help.servicetitan.com/set-up-automatic-appointment-reminders"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.servicetitan.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Set up automatic appointment reminders

## Problem

You are unable to add a phone number to send and receive SMS messages for appointment reminders. You receive an error message that says the phone number does not belong to ServiceTitan.

## Solution

1. If you try to add an *Outbound SMS* and *Outbound MMS* number in ServiceTitan so that you can text with it, the number must be a tracking number in ServiceTitan.

> [!NOTE]
> **Note:** If the phone number does not belong to ServiceTitan, follow this link to set up a call with the Telecom Team to port the number in. [Basic Phones Port In Link](https://calendly.com/servicetitan-telecom-team/porting-in-only-basic-phones-discovery-call?month=2024-01)
2. Once the number is integrated, go to **Settings > Phones > Phone Numbers** to add the *Outbound SMS* or *Outbound MMS* number.
3. In *Settings*, go to **Communications > Customer Notifications**.
4. Click **Reminder Notifications** and then select whether you want to send a *Text*, an *Email*, or both.
5. Click **Save** for each selection.
6. Do a hard refresh on your browser and Reminder notifications will start going out 24 hours before each appointment.
  1. To do a hard refresh on an Apple device, select CMD+Shift+R.
  2. To hard refresh on a Windows device, select Ctrl+Shift+R.

Targeted text message campaigns sent to customer segments through Marketing Pro.

**What it does:** Reaches customers on the highest-open-rate channel (SMS) with time-sensitive promotions, reminders, and service offers.

**Also called:** Text marketing, SMS marketing

**Tags:** Marketing Pro

[See the full glossary →](https://help.servicetitan.com/docs/glossary-overview)

**a.k.a.** Text Campaigns