If the above methods don't work or you prefer to download the update manually, follow these steps:
Released as part of the "Continuous" and "Classic" track transition, Acrobat Pro DC 2015 (Version 15) bridged the gap between the traditional perpetual license model and the modern cloud subscription. While Adobe has since moved on to newer versions (2017, 2020, and the current Continuous track), many users still need to download the final updates for Acrobat Pro DC 2015 to patch security vulnerabilities and maintain stability. adobe acrobat pro dc 2015 update download
Adobe ended official support for Acrobat 2015 Classic on June 6, 2020 . While the final updates are available for download, there are no new security fixes after that date. You are strongly advised to upgrade to Acrobat Pro 2020 or Acrobat Pro DC (Continuous) for modern workflows. If the above methods don't work or you