Office 365 Exchange Dynamic Distribution Group.

Hello, 

I want to create a dynamic distribution group in the O365 Exchange portal which uses a rule to "import" mailuser that has the Usagelocation attribute of "US".  

I do not see Usagelocation when I click the rule drop down.  Please see attached, and advise if there is a way.  

I apologize if this is not the correct forum.  I do not see any O365 forum in Technet.  

Thanks.