Office 365 (Outlook for iOS) - Invite a Resource Calendar
This document will provide you step-by-step instructions on how to invite a resource calendar on Outlook for iOS
1. Tap the Calendar icon to access your calendar.
2. Tap the plus icon at the top-right of the screen to create a new event.
3. In the Invitees section of the event, type the name or email address of the resource you would like to use. Fill in the rest of the event details as desired.
4. Tap Done at the top right corner of the screen to finish creating the event.