LinkedIn is set to be banned in Russia after a Moscow court upheld a decision to block the online social professional network in a landmark ruling enforcing a personal data law.

LinkedIn is the first foreign company to publicly clash with Russia's communications regulator, Roskomnadzor. In early August, a lower Russian court sided with Roskomnadzor, saying that LinkedIn didn't comply with Russian law on two counts—by not storing information about Russians on servers inside the country, as well as by processing information about third parties who aren't registered on the site and haven't signed the company's user agreement.

In response to the court decision, a spokesman for LinkedIn said the court decision "has the potential to deny access to LinkedIn for the millions of members we have in Russia and the companies that use LinkedIn to grow their businesses."

The company stated that it was interested in meeting with Roskomnadzor to speak about the data-localisation law.

LinkedIn has 2.6 million users who access the website from computers and phones in Russia, according to marketing research firm TNS.

Roskomnadzor, has been taking a tougher stance on foreign companies that aren't complying with a law that mandates them to keep Russians' personal data within the country's borders.

Earlier this year, Microsoft agreed to acquire LinkedIn Corp. for USD 26.2 billion.