Using Purview eDiscovery APIs in App-Only Mode

Most eDiscovery work is done interactively, but a use case exists for working with eDiscovery cases through apps, such as populating a large review set. It’s possible to configure an Entra ID app to work with the eDiscovery APIs in app-only rather than delegated mode, but only by using an Exchange service principal to add the app to the eDiscovery manager role group. This approach also works with Azure Automation runbooks that use Managed Identities.

https://practical365.com/ediscovery-app-only-mode/