You have to create a certificate and publish the certificate to all clients/Servers. Without certificate = no 3rd Party Updates publishing to clients/servers.
WARNING: Digital Signatures on file C:\Windows\SoftwareDistribution\Download\70901396e80ca9466a79b3ec2033eb1d\80d68140-00e9-4e71-bf93-6bab756a8aad_1.cab are not trusted: Error 0x800b0109
WARNING: Digital Signatures on file C:\Windows\SoftwareDistribution\Download\70901396e80ca9466a79b3ec2033eb1d\80d68140-00e9-4e71-bf93-6bab756a8aad_1.cab are not trusted: Error 0x800b0109