Hello All - I have gone through operations supported by REST APIs (http://msdn.microsoft.com/en-us/library/windowsazure/dn130116.aspx) but did not see exchange online attributes support. Maximum it can do is that it can assign a exchange license (which will create a mailbox) apart from this there is no option to manage exchange online specific attributes like 'AcceptMessagesOnlyFrom' etc...
Can anyone please confirm on this ?