I am trying to use the Office 365 API to write events to the calendars of anyone at our organization. This should not involve the users logging in to Office 365 at any point. The events to add are written out at various points during the day (when the user who would own the event may not even be at a computer), so the per-user token approach doesn't even make sense.
It appears that Microsoft provides an alternative that uses a service account. This account can be used to write to any user's calendar (or sending email as any user, etc.). However, I can't find any documentation on doing this. Could anyone provide a link to it?