Today I went to access my Live Calendar (URL https://bay04.calendar.live.com/calendar/calendar.aspx) as I normally do each day but my browser (Chrome) is giving me an error message:

bay04.calendar.live.com’s server DNS address could not be found.

Internet Explorer is also giving me a similar message.

How can I fix this and continue to access my Live Calendar?

Furthermore, the email alert function of the calendar has not been working for a few weeks so I can no longer receiving email notifications of calendar events.  Why?