Microsoft Root Certificate Authority 2011cer Work ⚡

It is a self-signed root certificate issued by Microsoft on May 9, 2011. It acts as the ultimate trust anchor for many Microsoft online services, including:

Key Identifiers:

⚠️ Note: This is not the same as the older “Microsoft Root Authority” (issued 1997) or the “Microsoft Root Certificate Authority 2010” (which was actually an older SHA-1 root). The 2011 version is SHA-256 based. microsoft root certificate authority 2011cer work

openssl x509 -in microsoft-root-2011.cer -text -noout

openssl x509 -in microsoft-root-2011.cer -noout -fingerprint -sha256

If this root certificate is missing, expired (not possible until 2036), or untrusted, you may see: It is a self-signed root certificate issued by

| Error Message | Likely Cause | |---------------|---------------| | NET::ERR_CERT_AUTHORITY_INVALID | Root certificate missing or not trusted. | | The certificate chain was issued by an authority that is not trusted | Manually removed root; or corporate GPO blocking it. | | Revocation status of the root certificate could not be determined | OCSP/CDP network issue (rare for roots). | Key Identifiers:

To ensure this root certificate works correctly on your systems: