Adobe provides five years of support for each of its products after launch. Support for Adobe Acrobat 2015 and Adobe Acrobat Reader 2015 will end on April 7, 2020.
This means that Adobe will terminate technical support, including product and/or security updates, for all products or product versions (localized versions, minor updates, operating systems, subversions, and connector products).
Therefore, we strongly recommend that you upgrade to the latest version of Adobe Acrobat DC and Adobe Acrobat Reader DC. By upgrading, you will always receive the latest features and security updates. Adobe’s new annual and monthly subscriptions are perfect for this, as well as giving you access to Adobe Document Cloud services.