Some time between 17:22  and 22:16 GMT on 21-DEC-2015 WL 2012 stopped retrieving Inbox items from Hotmail.

Can still send (but not shown in Sent Items).
New Inbox items are on the (Outlook.com) server, but WL 2012 reports No new email messages.
KB3093594 was applied on 11-DEC-2015 and send/receive worked OK until 21-DEC-2015.
Tried a Repair of Windows Live Essentials, but still not working.
Any suggestions as to what the problem might be?