Can anyone help me stop Calendar constantly attempting to share and asking for log in please?

Outlook is trying constantly to share my Calendar with Windows Live and keeps asking for id and password.  However the account doesn't exist ( I created a windows live account linked to my work email and deleted it the same day.  ) The account doesn't exist so sharing fails repeatedly and annoying log in box keeps popping up.

There does not appear to be any way in Calendar to stop the calendar sharing once I have ticked the radio button (auto upload / single upload) to share it. 

Have tried reactivating the account but my email address is "in use" (I understand it takes 30 days for email address to become available again once account has been deactivated)

 Thanks.