Microsoft Advertising has transitioned the Auto-generated assets setting for Responsive Search Ads to a new Text customization setting within AI Max. This shift maintains the existing preferences. An enabled setting remains enabled, and a disabled one remains inactive. Importantly, this migration does not automatically enroll campaigns into AI Max or its other features.
Users might notice a system-initiated update in their Change History due to this migration. This update merely reflects the transfer of preference settings, requiring no action unless advertisers wish to modify the Text customization settings.

For more information, Microsoft Advertising has published a new help page detailing this migration and its implications: FAQ: AI Max Text customization setting migration.
This update was spotted by Hana Kobzová.