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Microsoft Outlook

How to connect a Microsoft Outlook calendar to On-Call Optimizer

On-Call Optimizer can import availability from one or more Outlook calendars.

Connection process

To connect an Outlook calendar to your On-Call Optimizer account follow the connection instructions. In the Select calendar provider dialog, choose Outlook and click Begin connection. You are then asked to sign in to Microsoft and grant On-Call Optimizer read-only access to your calendars.

You can connect any number of Outlook calendars (for example work and personal) to one On-Call Optimizer account, as long as you can sign in and authorize each Microsoft account.

Updating calendar selection

To change which calendars supply availability, follow calendar configuration.

Disconnecting

To remove an Outlook Calendar connection:

  1. Click your avatar at the top right of the application and choose Calendars.
  2. Click the Disconnect icon (a circled cross) at the top right of the Outlook connection card.
  3. Click Disconnect in the Disconnect calendar dialog to confirm.

Disconnecting also removes all availability imported from the connection’s calendars.

Required permissions and data

On-Call Optimizer asks for the smallest OAuth permission set that works, and limits how much calendar data it reads and stores.

OAuth scopes requested

  • Calendars.Read
    • Reads the list of calendars so you can choose which ones to use.
    • Reads events on the calendars you chose, to match your availability.

Data accessed

On-Call Optimizer filters events to minimize the amount of information processed and retained. For matched events it stores only the start and end times and the action, not the title, description or participants.

Last updated October 22, 2026