Apparently we are having an issue with the Outlook Calendar.  Every time we click on the Calendar function it seems to be attempting to log in or something and then returns an error message stating that it was having a problem and could not access the Calendar and to try again later.  Have been attempting to access the Calendar all day - approximately 12 hours now and still get the same error message.  Under support it only indicates that the Calendar function was or would be down for maintenance on 23 Oct 2013, but since it is 25 Oct - not sure what is occurring.  All other functions Mail, People, SkyDrive seem to be working normally.  Any one else experiencing this issue or does anyone know if the issue is being addressed.