Office 365 (Outlook for Android) - Invite a Resource Calendar
This document will provide you step-by-step instructions on how to invite a resource calendar using Outlook for Android.
Tap the calendar icon located within the navigational pane at the bottom of the main screen to access your Calendar.
Tap the plus icon at the bottom of the screen to create a new event.
In the People 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.
Tap save in the top right corner of the screen to finish creating the event.