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Certificate Management is not managing the nonce cookie certificate (SharePoint Server)

APPLIES TO: no-img-132013 no-img-162016 no-img-192019 yes-img-seSubscription Edition no-img-sopSharePoint in Microsoft 365

Rule Name: SharePoint Server doesn't manage the nonce cookie certificate.

Summary: OpenID Connect (OIDC) authentication is configured in your SharePoint Server farm, but the certificate used to generate the nonce cookie isn't managed by the Certificate Management of SharePoint Server. As a result, you don't receive any system notification if that certificate is close to expiration, which would lead to farm service outage. In this case, SharePoint Server doesn't automatically grant required permissions of nonce cookie certificate to the Web Application Pool account if you enable OIDC for web applications, and you need to do it manually.

Cause: SharePoint Server farm currently uses the certificate that is used to generate the nonce cookie but doesn't manage it.

Resolution: Import the nonce cookie certificate

Ensure proper management and notification of the certificate expiration by following the steps to avoid issues with Web Application Pool account while enabling OIDC in web application:

  1. Import nonce cookie certificate in Certificate Management of SharePoint Server.

  2. Start SharePoint Management Shell and run the following script to update the certificate property.

     # Use one of the commands to acquire nonce cookie certificate imported:
     $nonceCert = Get-SPCertificate -DisplayName <the certificate name>
     $nonceCert = Get-SPCertificate -Thumbprint <thumbprint>
    
     # Update
     $farm = Get-SPFarm 
     $farm.UpdateNonceCertificate($nonceCert, $true)
    

For more information, see Change SharePoint farm properties.