Set Up Service Users in SharePoint
You can only use Service Users if you do not use two-factor authentication to sign in to SharePoint.
SharePoint Online
If you use SharePoint Online, you do not need to set up a special service user in SharePoint. In this case, a service account that is not associated with a specific user is used automatically.
SharePoint On-Premises
If you are using SharePoint On-Premises, you can specify SharePoint users to be used as service users. You must enter these users' usernames and passwords in Intrexx.
For detailed information on this topic, see the section " Create a service account for SharePoint On-Premises."