ACI is known as Adobe Certified Instructor. Adobe Certified Instructor is an Adobe Certified Expert (ACE) with proven training expertise. An Adobe Certified Instructor may operate a commercial training business or be an employee of a training organization. That organization must be authorized as an Adobe Authorized Training Center (AATC).
If you want to become an ACI then you must have an instructor qualification (passed the CompTIA CTT or equivalent), have passed one or more ACE exams, and accept the terms and conditions of the ACI program. After passing the exam you will become an Adobe Certified Instructor (ACI), you can be confident that you'll get the support you need to make your Adobe classes successful, with access to a wide range of Adobe resources including training materials, timely product updates, and promotional opportunities.