I did a contract at an airline. I was tasked with figuring out why the barcodes a new system was generating weren't scanning. I never did find a person still wo

I did a contract at an airline. I was tasked with figuring out why the barcodes a new system was generating weren't scanning. I never did find a person still working there who knew what was wrong, but by sheer persistence I finally found an old email someone had saved a copy o to their space on the company SharePoint. The problem turned out to be the wrong kind of cryptographic signature on content.