Moscow city will replace Microsoft Corp. programs with domestic software on thousands of computers in answer to President Vladimir Putin’s call for Russia’s authorities to reduce dependence on foreign technology amid tensions with the U.S. and Europe.

The city will initially replace Microsoft’s Exchange Server and Outlook on 6,000 computers with an e-mail system installed by state-run carrier Rostelecom PJSC, Artem Yermolaev, head of information technology for Moscow, told reporters Tuesday. Moscow may expand deployment of the new software, developed by Russia’s New Cloud Technologies, to as many as 600,000 computers and servers, and may also consider replacing Windows and Office, Yermolaev said.

Putin is urging state entities and local companies to go domestic amid concerns over security and reliability after U.S. firms shut down paid services in Crimea following Russia’s 2014 annexation.

http://www.bloomberg.com/news/articles/2016-09-27/moscow-drops-microsoft-outlook-as-putin-urges-self-sufficiency