To create an Event Category based off an existing iCal Feed:
  1. Create a new Event Category. This can be done in either onMessage or Core:​​
    • In onMessage:
      1. onMessage > Content > Events
      2. Add New Category
      3. Use iCal URL is Yes
      4. Type or paste the iCal URL into the text field. 
    • In Core
    1. Core > Communication > Content Types > Events
    2. Add New Category
    3. Use iCal URL is Yes
    4. Type or paste the iCal URL into the text field.

After the Event Category is created, you can then add a new calendar or attach it to an existing on in Core.
  1. Select Settings > Manage Calendar
  2. Add Calendar or Edit an Existing Calendar
  3. Select Filters
  4. Add Filter
  5. Add the newly created category
  6. Click Save
Note: The new iCal category can also be created directly inside of Manage Calendars in the Filters tab by clicking +Add Filters and choosing +New Category.