The certificate with thumbprint AC3215B73FDE0CD05713575010C9FD0435EA1678 was found but is not valid for use with Exchange Server (reason: SigningNotSupported)

Hi,

Hi,

I'm was trying to upgrade Exchange 2010 from SBS 2011 Standard to Exchange 2010 SP1 but the upgrade didn't complete due to the below error message:


Hub Transport Role
Failed

Error:
The following error was generated when "$error.Clear();
          Write-ExchangeSetupLog -Info "Creating SBS certificate";

          $thumbprint = [Microsoft.Win32.Registry]::GetValue("HKEY_LOCAL_MACHINE\Software\Microsoft\SmallBusinessServer\Networking", "LeafCertThumbPrint", $null);

          if (![System.String]::IsNullOrEmpty($thumbprint))
          {
            Write-ExchangeSetupLog -Info "Enabling certificate with thumbprint: $thumbprint for SMTP service";
            Enable-ExchangeCertificate -Thumbprint $thumbprint -Services SMTP;
            
            Write-ExchangeSetupLog -Info "Removing default Exchange Certificate";
            Get-ExchangeCertificate | where {$_.FriendlyName.ToString() -eq "Microsoft Exchange"} | Remove-ExchangeCertificate;

            Write-ExchangeSetupLog -Info "Checking if default Exchange Certificate is removed";
            $certs = Get-ExchangeCertificate | where {$_.FriendlyName.ToString() -eq "Microsoft Exchange"};
            if ($certs)
            {
              Write-ExchangeSetupLog -Error "Failed to remove existing exchange certificate"
            }
          }
          else
          {
            Write-ExchangeSetupLog -Warning "Cannot find the SBS certificate";
          }
        " was run: "The certificate with thumbprint AC3215B73FDE0CD05713575010C9FD0435EA1678 was found but is not valid for use with Exchange Server (reason: SigningNotSupported).".

The certificate with thumbprint AC3215B73FDE0CD05713575010C9FD0435EA1678 was found but is not valid for use with Exchange Server (reason: SigningNotSupported).
 

Elapsed Time: 00:04:26

Could some one please help ?