Add support for Exchange ActiveSync Device Partnerships to Graph API
Currently to retrieve information about all ActiveSync Device Partnerships from Exchange Online, you need to either use ECP or Exchange Online PowerShell. Both of these ways are _VERY SLOW_. ECP because it's manual, and PowerShell because you either have to grab a) all mailboxes (get-mailbox) or b) all partnerships (get-mobiledevice), and then loop through the list to look at each partnership (get-mobiledevicestatistics).
It'd be so much quicker if this was available via the Graph API.