Set up the service account
- Log on to the Exchange Admin through the Office365 portal.
- In the Exchange admin center, click permissions.
- Click to create a new role group.
- Enter a descriptive name in the popup window.
- Add a role and choose ApplicationImpersonation.
- Add the member user you want allow these permissions to.
Use these settings to enter in the manage-sources-email section of Indica. Read more in this document.