<p>Microsoft Office 365 customers could be in for a tricky time in China after a Beijing IT company called on Redmond to prove it has the legal authority to operate in the country or risk being blocked.</p><p>Enterprise IT service provider and Microsoft customer Baihui Zongheng Technology made the calls at a press conference at the China National Convention Center in the capital on Thursday, according to local media reports translated by Beijing-based tech consultancy Marbridge Consulting.</p><p>The firm apparently called on tech businesses to "operate cloud computing services in compliance with the law", releasing an open letter demanding Microsoft provide proof of its legality.</p><p>The letter apparently asks that Redmond show evidence it has a license to operate commercial internet information services in China, as well as proof that it is allowed to operate a cross-border telecoms service.</p><p><a href="http://www.theregister.co.uk/2013/03/15/office_365_microsoft_china_license/">Keep reading...</a></p><p>Read also:</p><p><a href="http://www.mediaweek.co.uk/news/1174748/Microsoft-add-Wi-Fi-park-benches-part-Office-365-campaign/">Microsoft to add Wi-Fi to park benches as part of Office 365 campaign</a> (Media Week (registration))</p><p><a href="http://www.thedrum.com/news/2013/03/15/microsoft-rolls-out-marketing-activity-including-free-wi-fi-promote-microsoft-office">Microsoft rolls out marketing activity including free Wi-Fi to promote ...</a> (The Drum)</p><p><a href="http://www.marbridgeconsulting.com/marbridgedaily/2013-03-14/article/64202/baihui_zongheng_challenges_legality_of_microsofts_office_365">Baihui Zongheng Challenges Legality of Microsoft&#039;s Office 365</a> (Marbridge Consulting)</p><p>Explore: <a href="http://news.google.com/news/more?ncl=dur19nF1NDcCXLMwDUM4ZXtzgSXvM&ned=us">6 additional articles.</a></p>