Office 365 Exchange, as of last week multiple Office 2010 clients having connectivity issues with their email. Running RCA test confirms that https://autodiscover.outlook.com/autodiscover/autodiscover.xml is not responding.
Further tests confirm port 443 is not open! CNAME records configured appropriately... autodiscover.mydomain.com is a CNAME for autodiscover.outlook.com
Can't setup new mail profiles for users because Autodiscover fails!
What's up???