3 thoughts on “Validating package signature foundation verification failed”
By default, you can check the time based on when the signature was created. In contrast, XML signatures only have two data verification states, valid and invalid.
After reviewing the report, you can contact the author of the document about the problems listed in the report. For more information, see blogs.
However, you can add more signatures to the cover sheet. In the Signatures panel, select and expand the signature, and choose View Signed Version from the Option menu.