Microsoft site throwing warnings after someone forgot to renew cert

Microsoft appears to have dropped the ball with its certificate management after a domain used by sysadmins worldwide to test connectivity to Microsoft 365 started throwing untrusted connection warnings in browsers. The connectivity.office.com domain is used by IT pros to test their network's connectivity to Microsoft 365 and ensure their firewalls aren't blocking anything that could affect an organization's access to Microsoft servers. An SSL server report retrieved on Monday showed that the ce