The Curiously Unfinished Outlook Settings API

The Outlook settings API is a unfinished Graph API that can read and update some but not all mailbox settings. It's a pity that the API is incomplete because it would be nice to have a comprehensive API that supported every mailbox setting, including some of the more recently introduced tweaks seen in OWA. The current state of the Outlook settings API is usable but not for much, but at least it can update auto-reply settings.