Meanwhile, since the calendar works fine in OWA, the issue should be related to the Outlook desktop client. A calendar shared with you in the new approach appears as just another calendar in your mailbox. Viewing properties of the calendar returns 'Cannot display the folder properties. Scheduling assistant pulls data directly from the server.
Shared calendar could not be updated outlook 2016 The calendar belongs to a mailbox on a local Exchange 2016 server with CU10.