With the release in preview of the Exchange Online Admin API recently this has unlocked a Migration path for those EWS apps that are stuck because of the lack of Delegate operations.
Am I understanding the script correctly that the Outlook option “Delegate receives copies of meeting-related messages sent to me” or EWS "ReceiveCopiesOfMeetingMessages" is effectively evaluated based on the Calendar folder permission: AccessRights = Editor and 'SharingPermissionFlags contains Delegate'?
When I configure a delegate via EWS with ReceiveCopiesOfMeetingMessages = false, I still see Editor access rights and SharingPermissionFlags = Delegate when reading the permissions via PowerShell.
It really about the Delegate (SharingPermissionFlags) settings as when you set this you are then creating the Delegate information object and the extended Inbox Rule that gets created for the meeting forwards. You can have Editor Rights regardless of delegate setting this is just a DACL permission. You could have lower folder permission and still have delegate access as well but the way they implemented the PowerShell logic its isn’t as flexible as to what you can do in the Outlook UI or EWS which make it a little clunky to use. With that in particular you also have https://learn.microsoft.com/en-us/graph/api/resources/mailboxSettings?view=graph-rest-1.0
Am I understanding the script correctly that the Outlook option “Delegate receives copies of meeting-related messages sent to me” or EWS "ReceiveCopiesOfMeetingMessages" is effectively evaluated based on the Calendar folder permission: AccessRights = Editor and 'SharingPermissionFlags contains Delegate'?
When I configure a delegate via EWS with ReceiveCopiesOfMeetingMessages = false, I still see Editor access rights and SharingPermissionFlags = Delegate when reading the permissions via PowerShell.
It really about the Delegate (SharingPermissionFlags) settings as when you set this you are then creating the Delegate information object and the extended Inbox Rule that gets created for the meeting forwards. You can have Editor Rights regardless of delegate setting this is just a DACL permission. You could have lower folder permission and still have delegate access as well but the way they implemented the PowerShell logic its isn’t as flexible as to what you can do in the Outlook UI or EWS which make it a little clunky to use. With that in particular you also have https://learn.microsoft.com/en-us/graph/api/resources/mailboxSettings?view=graph-rest-1.0