If the deal is accepted by works councils in France and regulatory approval, Computacenter will take over a business carrying out management and maintenance of IT and network infrastructure across France, along with networking and related services.
In the year to March 2019, BT's French operations generated revenue of around £104mln (roughly €118mln).
Computacenter said the acquisition will enable it to strengthen its position in the French networking market and increase the number of its major domestic customers in France, where it made revenues of €644.7mln last year.
For BT, the deal comes after the agreed sale of its Spanish business in December and is part of a process to sell off non-core businesses, as it looks to service its massive debt pile and roll out its fibre broadband network in the UK.
“With this agreement we are close to reaching another milestone in the execution of our strategy to make BT Global a more agile business focused on the growing requirements of our multinational customers,” said Bas Burger, chief executive of BT’s global segment.
Earlier this month, BT also agreed to sell parts of its operations and infrastructure in 16 Latin American countries to private equity group CIH Technology, a deal that is expected to complete during 2020.
Terms of neither deal were disclosed.