If you already own a perpetual license and need to retrieve your serial number, you can find it through the following official channels: Adobe Account : Log in to the Adobe Account Management
portal using the email address used for the original purchase. Registered serial numbers are listed under Plans and products Order Confirmation Adobe Acrobat Xi Pro 11.0.12 Serial Number
Adobe Acrobat XI Pro is a legacy product that reached its End of Support on October 15, 2017 If you already own a perpetual license and