Forum Discussion
Gernot_Meyer
Jul 30, 2026Copper Contributor
Windows integrated CA - Certificates are not usable for any browser NET::ERR_CERT_INVALID
Hi all, a Windows integrated CA on Windows Server 2025. I have published web server certs on IIS (should be for Exchange on prem). Did this couple of times. But all Certificates released by this C...
Gernot_Meyer
Jul 31, 2026Copper Contributor
Hi,
thanks for quick answer. Surely I tried with severname instead of localhost. But same result.
I included fqdn also. But also for localhost you should normally be able to continue showing content in browser after excepting browser warning.
certutil I checked and did not get any visible error.
I also created a new web site on exchange server on unused port just for checking. So it has nothing to do with exchange.
Changing the certificate to a self signed cert created by the server itself, web pages are running fine (after excepting warning). So NET::ERR_CERT_INVALID error has something to do with my domain CA. I also created a lets encrypt that works fine.
More help is needed.