Hello, I am having trouble using s/mime encryption on Biztalk 2004 SP1, running at Win2003. I have created a custom pipeline to encrypt outgoing smime messages. I have configured the certificates as explained in the documentation, however Biztalk still says: Encoder could not find the signing certificate in the "Current User\Personal" certificate store. Unable to sign outbound message. I have double checked the certificate setup, everything is correct. Also, when I setup the pipeline as "Sign" message without encryption, everything works fine and the message is signed with correct certificate. Does anyone know what could be wrong? Regards, Martin