Policy
Stop checking for alt text accessibility information
This policy setting prevents the Accessibility Checker from verifying that objects such as images and shapes contain alt text. If you enable this policy setting, the Accessibility Checker will be prevented from verifying that objects such as images and shapes contain alt text. If you disable or do not configure this policy setting, objects will be checked for alternative text and any issues will appear in the Accessibility Checker.
291bb4f87191 L_StopCheckingAltTextAccessibilityInformation Registry
Copy registry mappings
HKCU\software\policies\microsoft\office\16.0\word\accchecker\alttext (enabled) = 0
HKCU\software\policies\microsoft\office\16.0\word\accchecker\alttext (disabled) = 1 Policy notes
This policy setting prevents the Accessibility Checker from verifying that objects such as images and shapes contain alt text. If you enable this policy setting, the Accessibility Checker will be prevented from verifying that objects such as images and shapes contain alt text. If you disable or do not configure this policy setting, objects will be checked for alternative text and any issues will appear in the Accessibility Checker.