When I compose a new email in OUTLOOK.COM and attempt to insert an attachment from any network share, I get the error message "Access denied".  This only happens with Internet Explorer 10.0.9200.16688.  It works just fine using Firefox, Chrome, Safari. 

Can someone please help me.  This is impossible.  I have full control permissions on the network shares so please don't try to suggest its something

to do with file permissions.