The outage is intermittent. I saw the message about no server available. When I closed the browser and tried again, there was no error message, but no folders displayed. After repeated attempts, folders displayed but individual emails wouldn't load. Eventually, folders and emails loaded properly. But, an error message returned. Webmail fully loaded when I retried. Now the following error message is displayed:
"Unable to connect to mail server. Possible reasons: The mail server is (temporarily) down or there are network connection problems. Please try again in a few minutes".