Did the ATT W10M update today. Seemed OK but when I looked at my Contacts there were only a few listed, many more not. Sync problem? Wait a day and see what happens? Also Outlook mail app is not letting me connect.
Same problem here. Basically it is as if the phone cannot connect to Hotmail to retrieve contacts, emails and calendar (but there is no error message). Trying to add Hotmail account again does not help. Looking for a solution.