I have started in a new organisation recently and I have received a renewal for a SSL certificate. The vendor is Thawte. I know the certificate we are currently using for Exchange Services is from GeoTrust. My question is is there anyway or application I can use to find out if this Thawte certificate is being used anywhere on our network? The Thawte certificate is mail.domainname whereas our Geotrust is *.domainname. I am pretty sure the wildcard certificate has replaced it, however I need to be sure before I let it expire.
Thanks in advance.