how to update ca-bundle.crt with local company-root.crt

I am on RHEL 6.9

When I run the command
sudo rpm --import https://packages.microsoft.com/keys/microsoft.asc

I get the following message

 curl performs SSL certificate verification by default, using a "bundle"
 of Certificate Authority (CA) public keys (CA certs). If the default
 bundle file isn't adequate, you can specify an alternate file
 using the --cacert option.
If this HTTPS server uses a certificate signed by a CA represented in
 the bundle, the certificate verification probably failed due to a
 problem with the certificate (it might be expired, or the name might
 not match the domain name in the URL).
If you'd like to turn off curl's verification of the certificate, use
 the -k (or --insecure) option.
error: https://packages.microsoft.com/keys/microsoft.asc: import read failed(2).

I have tried to use -k and --insecure both fail with something like --inecure: unknown option

I am behind a company firewall intercepts all TLS/SSL certs and replaces it with it’s own.

Question: how do I get around this problem?

• I have a company rootCert.crt on my desktop is there a way to make this the default system cert? Would it fix the problem?

# sudo update-ca-trust

# update-ca-trust enable