AutoComplete will behave like a normal TextInput to screen readers. If an item in the popup list is selected, the text field will declare this value.
There is no MSAA designation for AutoComplete, so its role cannot be properly voiced to screen readers. Currently, popups do not declare themselves to the screen reader.
To enable accessibility, do the following:
Sample Accessible Application
Below is an embedded application built to showcase accessibility. To experience this application properly, you must have a screen reader installed and be familiar with how to use it. Accessibility was developed with JAWS for Windows as the primary screen reader. Installing the JAWS Flex Scripts is highly recommended to obtain the most reliable results.