2011.cer [upd] - Microsoft Root Certificate Authority
Understanding the Microsoft Root Certificate Authority 2011.cer
- Copy the .cer as PEM to /usr/local/share/ca-certificates/ with .crt extension: sudo cp MicrosoftRootCA2011.cer /usr/local/share/ca-certificates/MicrosoftRootCA2011.crt
- Update store: sudo update-ca-certificates
Appendix A: Sample File Data (Hex Dump of DER file header)
(Shortened for brevity)
30 82 03 09 30 82 ... (full DER structure available in Microsoft’s PKI repository) microsoft root certificate authority 2011.cer
6) Troubleshooting
- Missing after install: ensure certificate placed into the correct store (System/Computer Trusted Roots, not Personal).
- Browser still warns: some browsers (Firefox) maintain their own certificate store — import into Firefox’s Certificate Manager.
- Wrong format: convert between DER/PEM as needed.
If you have ever opened the Microsoft Management Console (MMC) to inspect your certificate store, or troubleshot an SSL error, you have likely seen this name. But what exactly is this file? Why does it matter? And what happens when it goes missing or becomes corrupt? Understanding the Microsoft Root Certificate Authority 2011
By installing this certificate, you can ensure that Microsoft products and services can be trusted to communicate securely with your device. Copy the
