All of our digitally signed documents (and I'm talking hundreds!) that previously had the blue certificate and stated the signature was certified and valid have below message now. I have a feeling this occurred because the digital certificate expired (but has since been renewed) and Acrobat does not "know" this. Are the signatures on this document still valid? Is there a way to fix the "blue bar" to say the signature is certified? We are using Adobe Acrobat X.