Don wanted us to verify if the certificate needs to be renewed or if it was auto renewed already.
In the initial analysis, the site was found to be redirected to gastateparks.org. So, informed Don that gastateparks.org is already covered with SSL. So they need not worry about explore.gastateparks.org.
Don again came back with explore.gastateparks.org/signin is showing a certificate that is about to explore. With further analysis, found that gastateparks.org is using the certificate "dnrintranet.org", however, "explore.gastateparks.org" is using the certificate "gastateparks.org". Though this certificate got auto-renewed on GoDaddy in August or so, the renewed certificate was not configured on explore.gastateparks.org. Sirisha sent the certificates to Don and he configured them on their Windows server.