OUTLOOK (WITH EXCHANGE)
See also Microsoft’s instructions.
See also instructions from Apple. If you’d like to have iCloud to push a Teamup Calendar feed to all your Apple devices, subscribe it on your Mac (not on iPhone or iPad), make sure to choose “iCloud” as the Location as described here.
iPad / iPhone
For iPhone users, in most cases tapping the Teamup iCalendar feed URL will launch the calendar application and the feed subscription dialog appears. If that is not the case for you, follow these steps: