If you need this specific version for legacy software compatibility, here is a warning post followed by the download post.
Adobe no longer lists Acrobat XI on its public site, but users with a valid serial number can still retrieve it. download adobe acrobat xi standard
Caption for LinkedIn, Facebook, or Internal Company Chat: ⚠️ SECURITY ALERT: Do not download Adobe Acrobat XI Standard from random sites. If you need this specific version for legacy
