Reminders are very important in Outlook which will help you remember meetings and appointments etc. Outlook by default turned reminders on, but you can disable them if you do not like reminders. On the other hand, if the reminders in your Outlook disappeared, you can follow the steps below to bring them back:
Step 1: Click the "File" tab from the Ribbon;
Step 2: Click "Options" from the left navigation;
Step 3: Click "Advanced" from the left navigation bar;
Step 4: Check the "Show reminders" box in the "Reminders" section to show reminders, or uncheck the box to disable reminders;
You can also change the "Play reminder sound" in the box below.
Step 5: Click "OK" to close the "Outlook Options" window.