I'm working on an application that does OAuth authorization on behalf of multiple users. My application wants to be able to create a calendar for user A and then share that calendar as read only to user B. It will then create events on that calendar so that they appear for user A as read/write and for user B as read only.
Obviously the Microsoft Graph API supports creating a calendar and putting events on it. My question pertains to the sharing part.
Does the Microsoft Graph API (or the Outlook 365 REST API) support sharing a calendar from one user to another user? I wouldn't want user B to receive the typical email that announces that user A shared a calendar with them. After creating the calendar under user A's account, I'd want to use user A's credentials to set up the sharing permission to user B. Then I would use user B's credentials to add the shared calendar to their list of calendars so that they see it in the Outlook 365 calendar interface.
I've read through a lot of the documentation and have been playing around with a prototype, but I can't find where this use case is supported.
I'm afraid this isn't possible to do via Microsoft Graph. The scenario seems reasonably straight forward, I recommend visiting the UserVoice and adding this suggestion.