What do the hex values in the "Issue by" field for certificates mean (MMC - Microsoft Managment Console)

Question

I was messing around with the MMC consoles and certificates when I came across a couple of "issued by" fields that had hex values in them (i.e. 5cf27d8b-5547-420f-b20c-9460ca291bdd). What do the hex values mean and is there a reason why a certificate would use a hex value as in this field?

Answer 1

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A certificate thumbprint is an hexadecimal string that uniquely identifies a certificate. A thumbprint is calculated from the content of the certificate using a thumbprint algorithm. CES accepts Secure Hash Algorithm 1 (SHA-1) thumbprints in the 40-digit hexadecimal string form without spaces.

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