You can set Reminders in the following locations:
My Messages located in the Messages layer of the Collaboration Suite.
The Workflow tab found in the Individual Profile, Service File, Service Event etc.
Add a Reminder – My Messages
On the My Messages page click the clock icon at the top of the screen.
Complete the fields as required (When, What and Assign).
Click Set.
Add a Reminder – Workflow Tab
Navigate to the Workflow tab on the right-hand side.
In the Reminder section select Add.
Complete the fields as required (Record, Reminder Time and Text to Display).
Click Save.