Steps to resolve Sitecore Commerce Certificate with thumbprint is not within a valid time window.

ClientCertificateValidationMiddleware: Certificate with thumbprint C18A42CDF58D769F2774D94367018CFBA7A2E89B is not within a valid time window.

1) Open PowerShell as admin

2) Run

New-SelfSignedCertificate -certstorelocation cert:\localmachine\my -dnsname “woodward.sc”

3) Copy the thumbprint returned in the result.

PSParentPath: Microsoft.PowerShell.Security\Certificate::LocalMachine\my

Thumbprint Subject
———- ——-
E3A9988F68349D9ED74A20A2EDEB0A3C633D44FD CN=woodward.sc

4) Edit the following files

• C:\inetpub\wwwroot\CommerceAuthoring_Sc9\wwwroot\config.json
• C:\inetpub\wwwroot\CommerceMinions_Sc9\wwwroot\config.json
• C:\inetpub\wwwroot\CommerceOps_Sc9\wwwroot\config.json
• C:\inetpub\wwwroot\CommerceShops_Sc9\wwwroot\config.json

5) Replace the thumprint value with the value just created and save the change

            "Thumbprint": "E3A9988F68349D9ED74A20A2EDEB0A3C633D44FD",

6) Edit C:\inetpub\wwwroot\woodward.sc\App_Config\Include\Y.Commerce.Engine\Sitecore.Commerce.Engine.Connect.config

Replace the certificate thumbprint

<CertificateThumprint> E3A9988F68349D9ED74A20A2EDEB0A3C633D44FD</CertificateThumbprint>

7) Run IISRestart