Microsoft has threatened to cut off access to its internet-search data, which it licenses to rival search engines, if they don’t stop using it as the basis for their own artificial intelligence chat products. The software maker licenses the data in its Bing search index to other companies that offer web search, such as Apollo Global Management Inc.’s Yahoo and DuckDuckGo. Rivals quickly moved to roll out their own AI chatbots as hype built around the buzzy technology, such as Alphabet Inc.’s Google’s Bard and DuckDuckGo’s DuckAssist.