Once having the scheduler cron job running, you need to activate the event remider mailing in the calendar extension. To do this, go to the system adminstration area of todoyu (using the cogwheel icon from the todoyu headlets bar) and open the configuration of the calendar extension. Over here check the "Activate event reminders per email" option.

To control whether, when and to whom send reminder emails, todoyu provides a multi-level configuration:

• A general preset of how long before each event the respective reminder emails will be sent. This is set up in the "System default email reminder" option of the configuration of the calendar extension. Users that have not chosen/saved any reminder preference in their profile are receiving the email reminder as configured by this setting.
• Every user (with access to todoyu and the calendar module / reminders) can configure his personal general preference whether and how long before each event to receive reminder emails. This is done by the individual user, in his todoyu profile (open your profile via the person icon in the headlets bar and go to the "Event reminders" tab of the "Calendar" module in your profile).
• Every user (with access to todoyu and the calendar module / reminders) can schedule the email reminder for every single event he participates in individually. This can be done by editing the event, or quickly via the event context menu: