June 29, 2021 The headquarters of Microsoft France at Issy-les-Moulineaux, near Paris, on April 18, 2016. Reuters Microsoft said on Friday (June 25) an attacker had won access to one of its customer-service agents and then used information from that to launch hacking attempts against customers. The company said it had found the compromise during its response to hacks by a team it identifies as responsible for earlier major breaches at SolarWinds and Microsoft. Microsoft said it had warned the affected customers. A copy of one warning seen by Reuters said the attacker belonged to the group Microsoft calls Nobelium and that it had access during the second half of May.