Knowledgebase

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.