x.ai fully supports Google calendar, Office 365 and outlook.com and you can easily connect any of these calendars.
Microsoft calendars hosted on an Exchange server and iCloud integration will follow soon!
We know it's not always easy to tell if your Outlook or Office 365 calendar is running on Exchange. You can test your calendar connection here.
More resources:
What information can x.ai see from my connected calendars?
I can't connect my calendar on my.x.ai
x.ai lost access to my calendar