1. Go to the required campaign.
2. Click on the "Edit Campaign" button.
3. Choose the "Settings" tab.
4. Click on the "Activate" button under the "Work anniversary Reminder" section.
5. Enter the number of days before the employee's birthday/work anniversary you wish a reminder to be sent.
6. Fill in the email address.
7. If you also want the reminders sent to the employees' direct managers, click on the Send Manager Reminders to Direct Managers toggle.
8. Hit "Save".