Bing
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Bing adds a separate AI grounding control for publishers, with a March 2027 deadline
Microsoft will let publishers set AI training and AI grounding preferences separately. Sites relying on NoArchive or NoCache must act by March 1, 2027, to keep their restrictions.
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Google, OpenAI and Microsoft back a shared robots.txt signal for AI training
OpenAI and Microsoft say they will honor a shared robots.txt signal for AI training preferences, and Google plans to. It covers training only and rests on an IETF draft with no formal standing.