Microsoft Tells Affected Users SolarWinds Hacker Had Gained Access to Its Customer Service Tools Microsoft identifies the group that was also behind SolarWinds breach as Nobelium. By Reuters | Updated: 26 June 2021 12:10 IST Photo Credit: Reuters Highlights The hacker has been called a sophisticated Nation-State associated actor Microsoft said the information was used to launch highly-targeted attacks Microsoft said on Friday 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.