Google formally complained to the EU antitrust regulatory authorities on Wednesday, accusing Microsoft of abusing its market dominance and intensifying the fierce legal battle between Google and Microsoft in the cloud computing market.

Google claims that Microsoft's licensing terms for Azure cloud services restrict customers' access to competitors' platforms, including Google Cloud and Amazon Web Services (AWS). Google stated that, according to EU law, Microsoft's actions constitute an abuse of market dominance.

Google also pointed out that Microsoft's dominant position in the cloud computing field may expose EU citizens to security risks and the threat of information technology failures. Google specifically mentioned that in July of this year, an erroneous update by the cybersecurity company CrowdStrike Holdings Inc. led to the collapse of millions of Windows computers, affecting airports, banks, stock exchanges, and enterprises worldwide, causing chaos.

Media reports indicate that just before Google filed the complaint, Microsoft had reached an agreement with smaller European cloud companies, an agreement that allowed Microsoft to avoid a formal EU investigation. Google had tried to block the settlement but was unsuccessful. According to EU antitrust law, fines for violations can be as high as 10% of a company's annual sales.

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However, Microsoft stated that it expects Google's allegations will not be supported by EU regulatory authorities.

"Although Google had hoped these companies would continue litigation, Microsoft has amicably resolved similar concerns with European cloud providers," said a Microsoft spokesperson. "Since Google failed to persuade European companies, we expect Google will also fail to persuade the European Commission."

Currently, the European Commission has confirmed receipt of the complaint and stated that it will be assessed according to standard procedures.

According to financial reports, Google Cloud's profit for the second quarter was $1.17 billion, exceeding analysts' expectations of $982 million in operating revenue. Although Google still lags behind Amazon and Microsoft in the cloud computing market, the division has attracted a significant amount of business from artificial intelligence startups over the past year.

Analysts believe that the public dispute between Google and Microsoft over cloud computing dominance recalls the disputes years ago regarding the abuse of Windows' dominant position. In 2009, Microsoft finally agreed to open its operating system to support competitors' browsers to alleviate the growing EU antitrust threats at the time.

Meanwhile, the EU has been active in antitrust actions this year, with both Google and Microsoft being targeted.EU officials are preparing to formally charge Google under the Digital Markets Act (DMA). The EU regulatory authorities have issued an ultimatum to Google, warning that if it fails to address the EU's concerns and quickly takes action to more prominently feature competitors' products in its search services, Google could face a hefty fine, potentially up to 10% of the company's global annual revenue. Preliminary investigation results may be announced by the end of October this year, with the EU expected to make a final ruling by the end of March next year.

The relationship between Microsoft and OpenAI is also under the scrutiny of the EU. EU regulators previously conducted a merger control review of Microsoft's $13 billion investment in OpenAI, but it was canceled due to insufficient evidence. Now, they are planning a more in-depth antitrust investigation into the deal.