The most reliable way to find your serial number is through your official Adobe profile. Adobe Account Navigate to Plans and Products (sometimes under Registered Products Acrobat 2017
Adobe’s activation servers frequently scan for leaked or pirated serial numbers. Once a key is identified as "public," it is blacklisted and will no longer work. adobe acrobat pro dc serial number list 2017
Most "leaked" keys are volume license keys that have already exceeded their activation limits or have been blacklisted by Adobe. Software Mismatch: The most reliable way to find your serial