Hello Scott and Michael,
Yes, ArcGIS Indoors integrates with Microsoft 365. This feature can be used for Office Hotels and Meeting Rooms booking. To see a list of available rooms for a specified date, time and duration and to book one that meets your requirements you need to:
- Add emails (every room in Outlook has a resource mailbox) to the corresponding features in the Units layer
- Sign in to your MS account (from within Indoors apps) to see available rooms and book them
A request is sent to Outlook by Indoors on your behalf and shortly after, you will receive an email confirmation - just the way you receive one when you book a room from within Outlook and an event will appear in your Outlook calendar too.