Users are getting untrusted server warnings when they connect to the URL https://asa.lab from their browsers. This URL resolves to 192.168.10.10, which is the IP address for a Cisco ASA configured…

Importing the CA into the machine trusted root store is unnecessary because the CA is already trusted - users encounter no warnings when accessing other servers that present certificates issued by the same internal CA.

Modern browsers validate that the hostname in the URL matches an entry in the certificate's Subject Alternative Name (SAN) field; since users connect via 'asa.lab' and this name is absent from the current certificate's SAN, reissuing the certificate with 'asa.lab' included in the SAN resolves the mismatch and eliminates the warning.

Importing the CA into the user trusted root store is redundant for the same reason - the CA trust is already established, as confirmed by the absence of warnings on other servers using certificates from that CA.

Adding the IP address 192.168.10.10 to the common name does not resolve the issue because users connect via the hostname 'asa.lab', and modern browsers require the SAN field to match the requested hostname rather than relying on the common name alone.