Hi Ameer,
In general, such issue is caused by incompatible SMIME type during processing. It seems Partner sending a document that was encrypted, but not signed while the Partner Profile has the “SMIME Type” field set to “signedAndEncrypted”. Can you please check if setting the “SMIME Type” field in the Partner Profile to “encrypted” helps?
May be looking at the EDIINT Install and user guide will help too.
Thanks.
#webMethods#B2B-Integration