By Joseph Menn
SAN FRANCISCO (Reuters) - 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.
Microsoft said it had warned the affected customers. A copy of one warning seen by Reuters said that the attacker belonged to the group Microsoft calls.