This article applies to Adobe Connect versions that supports Adobe Connect add-in. Starting Nov 2017, Adobe introduced the new Adobe Connect application for desktop that replaces the old Adobe Connect add-in for Adobe Connect version 9.x and later. If you are on Adobe Connect version 8 or earlier, you can continue to use Adobe Connect add-in.
Click Enable. Then, you see that the add-in is enabled in the Privacy tab of the Security & Privacy Settings.
If you update to a newer version of the add-in or remove and reinstall the add-in, you are prompted to enable the accessibility setting again. Deselect, and reselect the checkbox next to adobeconnectaddin to re-enable the setting.