Enabling SSL for calendar subscriptions

Note for OmniFocus 3 users: Previous versions of OmniFocus could publish a calendar of due items to your sync location in order to provide calendar notifications. The introduction of local notifications in iOS 4, which was released in 2010, removed the need for this workaround. Support for publishing calendar alarms was discontinued in OmniFocus 3.

Enabling SSL for your iOS calendar subscriptions provides an extra level of security. If you are using the Calendar Alarms subscription to show your OmniFocus Reminders due actions in your Calendar.app, you may want to enable SSL to make the transfer of data more secure.

To enable SSL for your OmniFocus Reminders calendar subscription, do the following on each iOS device:

1. Set up the Calendar Alarms subscription, if you haven’t already done so.
2. Open the Settings.app.
3. Tap Accounts & Passwords.
4. Tap Subscribed Calendars.
5. Tap OmniFocus Reminders.
6. Slide the Use SSL switch to ON.
7. Tap Done.

NB: The OmniFocus Calendar Alarms subscription on your Mac uses the https:// URL prefix, as opposed to the http:// URL prefix, which means it is a secure, encrypted connection by default.