Connect Outlook 365

Microsoft 365 and Outlook.com both connect via Microsoft Graph OAuth. Exchange Server on-prem is not supported.

1. 1
   Profile → Calendars → Connect Outlook

   Sign in with your Microsoft account.
2. 2
   Approve Calendar.Read and Calendar.ReadWrite scopes

   Required for busy reads and event writes.
3. 3
   Pick busy calendars and the write-back calendar

   Same two-step setup as Google.