Cedric,
from most of the windows boxes, we can remotely run Get-CsCertificate powershell command and get things like:
PSComputerName : xxx.xx.local
RunspaceId : 27f2fd9a-3afd-4d87-b152-8d8fd6be95a6
PSShowComputerName : True
Issuer : CN=xx-xx-CA, DC=xx, DC=local
NotAfter : 9/22/2018 2:06:44 PM
NotBefore : 9/22/2017 1:56:44 PM
SerialNumber :xx
Subject : CN=xx, OU=Denver, O=IR, L=xx, S=CO, C=US
AlternativeNames : {}
Thumbprint : 63E2CCC6AFC294A01363268936452607F2262F95
EffectiveDate : 9/22/2017 2:10:01 PM
PreviousThumbprint :
UpdateTime :
SourceScope : Global
Use : OAuthTokenIssuer
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Thanks,
Shoaib