QuoVadis provides a PKI Widget to help users verify that their SSL certificate is properly installed on their server.
For more information, please see https://pkiwidgets.quovadisglobal.com/pkiwidgets/verifyInstall.aspx
Please use an external Fully Qualified Domain Name (e.g. support.quovadisglobal.com) and port number (the tool defaults to 443).
The tool provides a report of the certificates - including chain - it sees installed at that FQDN, making it easy to spot if an intermediate or root certificate is missing or improperly installed.