On July 12 2016, Mobile Link will be discontinued in Acrobat and Reader. The feature will be removed from the user interface in the July 2016 update.
Read the FAQs below for more information. If you have additional questions, feel free to post in the community forum.
After Mobile Link is retired, files you view in Acrobat or Reader will no longer automatically upload to Adobe Document Cloud. However, your recent files will still be available, and you can still access them from your Recent Files list. PDFs you have stored in Document Cloud or other online storage partner sites will still be available, and you can access them from Acrobat or Reader.