Note: This article assumes you have access to: the CRT file, the certificate via IIS, IE, MMC or OpenSSL.
Windows (MMC, IE, IIS)
- Open Certificate to the General Tab.
- MMC:
Add/Remove Snap-in -> Certificates -> Add -> Close -> Expand (Click '+' Sign) Certificates -
Local Computer -> Personal -> Certificates -> Double-Click on a certificate to open.
- IIS 5 & 6:
Right-Click website -> Left-Click Properties -> Directory Security -> View Certificate
- IE:
Tools -> Internet Options -> Content -> Certificates
- Click on Details
- Be sure that the Show drop down displays All
- Click Serial number or Thumbprint. Depending on what you're looking for.
- Use combination CTRL+C to copy it.
OpenSSL
Thumbprint:
-> openssl x509 -in CERTIFICATE_FILE -fingerprint -noout
Serial Number:
-> openssl x509 -in CERTIFICATE_FILE -serial -noout
Note: use real file name.
