Bug report - outlook.com integration to OSX Mail app

Outlook.com is in the process of transferring accounts to their Office 365 architecture. This has unearthed a small bug with the way the OSX Mail app displays Outlook.com (aka Hotmail) email accounts when set up with the Exchange presets.

Specifically, the OSX Mail app shows folders like 'Yammer Root' and 'Files' that should not be shown.

Detail from Microsoft here: Re: Has anyone seen a folder in Mail called Yammer Root? I tried to erase but it is titled a distinguished folder and cannot be erased

Can someone on the Mail dev team look into it?

Cheers

Bob