Problem If you have a newly installed Link and you want to upload a certificate on a partner for the first time, you may meeting this message: No private key has been set for the partner-certificates. Use the EdiPortal Administration Tool to generate a private key and save it in the EdiPortal Configuration. Solution Generate private key Start Link Administration and go to BizTalk Settings. Comment: The menu name 'BizTalk Settings' is a misleading name. It should Link Settings, because the settings is also about Link settings and not only about Biztalk. Set the Key PartnerCertificatePrivateKey You can read about PartnerCertificatePrivateKey here: Link Settings Look for PartnerCertificatePrivateKey in the Key column. I you don't find PartnerCertificatePrivateKey, insert it at the bottom. Put in the generated private key under the correct environment: Recycle app pool

Metadata AS4 has a SOAP header for all metadata, so that very powerful. AS2 has only the http header. Security: A man-in-the-middle attack AS4 using SSL/TLS https. (transport security) AS2 encrypt the payload

Problem: Certificates with private keys keep prompting for password Solution: This might be a secutiry issue with the user running the app-pool of the web-site. See the browsers developer tool for more info about the error (hit F12 and check the network activity).