The State Administration for Industry and Commerce (SAIC) raided offices in Beijing, Liaoning, Fujian and Hubei, it said. The SAIC also raided the Dalian offices of IT consultancy Accenture, to whom Microsoft outsources financial work, according to the regulator. Microsoft and Accenture declined to provide immediate comment.
Last week, the SAIC said it was formally investigating Microsoft for breach of anti-trust rules .Microsoft has been suspected of violating China's anti-monopoly law since June last year in relation to problems with compatibility, bundling and document authentication for its Windows operating system and Microsoft Office software, the SAIC said last week.
Microsoft Deputy General Counsel Mary Snapp was in Beijing to meet with the SAIC on Monday, where the regulator warned Microsoft to not obstruct the probe. Industry experts have questioned how Microsoft is violating anti-trust regulations in China, where the size of its business is negligible.
The Microsoft investigation comes amidst a spate of anti-trust probes against foreign firms in China.