Mail notification: certificate revocation

Windows 2022 with DVLS 2025.2.4

The SMTP server had it's SSL\TLS certificate renewed. The Windows local certificate management has the new root and intermediates.

When attempting to run a test of mail notification get the error:
SslHandshakeException - An error occurred while attempting to establish an SSL or TLS connection.

The server's SSL certificate could not be validated for the following reasons:
• The server certificate has the following errors:
• The revocation function was unable to check revocation for the certificate.
• The revocation function was unable to check revocation because the revocation server was offline.
• An intermediate certificate has the following errors:
• The revocation function was unable to check revocation for the certificate.
• The revocation function was unable to check revocation because the revocation server was offline.


at MailKit.Net.Smtp.SmtpClient.PostConnect(Stream stream, String host, Int32 port, SecureSocketOptions options, Boolean starttls, CancellationToken cancellationToken)
at MailKit.Net.Smtp.SmtpClient.Connect(String host, Int32 port, SecureSocketOptions options, CancellationToken cancellationToken)
at Devolutions.Server.V2.Application.SmtpService.CreateService(EmailConfigurationEntity emailConfiguration)
at Devolutions.Server.EmailManager.CreateService(EmailConfigurationEntity settings)
at Devolutions.Server.EmailManager.<>c__DisplayClass41_0.<DoSendEmail>b__0()

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AuthenticationException - The remote certificate was rejected by the provided RemoteCertificateValidationCallback.

at System.Net.Security.SslStream.CompleteHandshake(SslAuthenticationOptions sslAuthenticationOptions)
at System.Net.Security.SslStream.ForceAuthenticationAsync[TIOAdapter](Boolean receiveFirst, Byte[] reAuthenticationData, CancellationToken cancellationToken)
at System.Net.Security.SslStream.AuthenticateAsClient(SslClientAuthenticationOptions sslClientAuthenticationOptions)
at MailKit.Net.Smtp.SmtpClient.PostConnect(Stream stream, String host, Int32 port, SecureSocketOptions options, Boolean starttls, CancellationToken cancellationToken)


Is there another certificate store that needs to be updated?