As announced some time ago the Office 365 Admin mobile application has been updated with a brand new interface and features which provide more administration stuff than the previous version which was more providing health services than anything else (see http://blog.hametbenoit.info/2015/03/15/office-365-office-365-admin-mobile-application-has-been-updated/)
Even if almost everyone was happy to get this new version, there was still some missing point such as the ability to assign license to federated users.
Good news, since today this is now possible 