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# Create an OAuth Application

The Exchange OData Connector retrieves information through the Microsoft Graph API. The connector has to authenticate with the API using OAuth. Before installing the connector, go to https://apps.dev.microsoft.com/#/appList, and create an application to represent the connector.

In the application settings, you can provide a redirect URL. Ensure that this matches the URL where you will run the IDOL OAuth configuration tool (by default, `http://localhost:7878/oauth`).

The connector requires the following delegated permissions:

- `Calendars.Read`
- `Directory.Read.All`
- `Group.Read.All`
- `Mail.Read`
- `offline_access`
- `User.Read`
- `User.Read.All`
- `User.ReadBasic.All`

To retrieve infromation for an organization, rather than a single user, the connector requires the delegated permissions listed above and the following application permissions:

- `Calendars.Read`
- `Directory.Read.All`
- `Group.Read.All`
- `Mail.Read`
- `User.Read.All`

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