AI Max for Search open beta flagged as affecting legacy API controls ahead of full v21 support

With the AI Max for Search open beta starting May 27, 2025 in the UI, Google warned that enabling then disabling AI Max in the UI could break API management of automatically created assets, campaign-level broad match and brand lists on older versions; full API support was scheduled for v21 in August 2025.

Legacy fields for ACA, campaign-level broad match and standalone brand inclusions/exclusions were slated for removal from the API after v21 adoption. Ad group-level brand inclusions and Locations of Interest pilots outside AI Max ended.