Graph API access to Exchange Server 2019 hybrid setup (on prem mailbox)

Iron Contributor

I read within the Microsoft docs ( that it should be possible to access basic resources like calendar or mail via the Graph API.

Behind the scenes, when Microsoft Graph identifies that a REST API call is attempting to access an on-premises mailbox in a hybrid deployment, it proxies the REST request to an on-premises REST endpoint which then processes the request. This discovery makes accessing the REST API possible.


We are using a hybrid setup with Exchange Server 2019 and on Prem mailboxes, but unfortunately I'm not able to access any data from there via Graph API.


2020-07-09 10_06_49-Graph Explorer - Microsoft Graph.png

1 Reply

@Thomsch I'm having the same issue. Any updates you can share?