Since the German city of Munich decided to ditch Microsoft Windows and Office, a growing number of European agencies have followed suit - from France's national police force to the Italian military.
About 6,000 Moscow state employees will be switched over, including teachers, doctors and civil servants. If the move is a success, the city will consider shifting 600,000 PCs and servers away from Microsoft, and may also replace Windows and Office, according to Bloomberg.
The migration will be carried out by Russian state-run carrier Rostelecom and will cut the council's costs by about 30 percent, according to the authority.
However, the switchover is not primarily about saving money. Moscow city council is reportedly dropping Microsoft Outlook and Exchange to minimise the risks associated with using a "foreign development platform".
The city's decision follows the introduction of a law earlier this year that prohibits government departments from buying software and services from foreign providers when there is a viable Russian alternative available.
The Russian presidential administration is also reportedly preparing proposals that network operators and data centers should be made up of 85 percent domestic equipment by 2020.
Following the transfer, only a single e-mail system within the Moscow government will continue to rely on Microsoft Exchange Server and Microsoft Outlook.
The authority's IT department has said the transfer should not negatively affect the quality of the service being provided.
Moscow communications minister Nikolai Nikiforov said that if the move is successful, he is hopeful that other government agencies might follow suit.
Moscow city council and Microsoft were contacted but were unavailable for comment at the time of publication.
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Nick Heath is chief reporter for TechRepublic. He writes about the technology that IT decision makers need to know about, and the latest happenings in the European tech scene.