We set up the SSL Certificate Sensor on an web server vectorneighbourhood.co.nz. It reported correctly the certificate was expiring and we have since renewed the certificate. The website now reports correctly that our certificate expires on 16/12/2020. The sensor is still telling us there's 9 days until the certificate expires. Thinking this might then be something that's cached, we have added the sensor to a brand new installation of PRTG on a demo server environment. This new install tells us there's 9 days for the certificate to expire ... where is this information coming from?? Why doesn't it pick up the new certificate information?? It's the same issue olas had in August.
Certificate expiry error