SHARE Microsoft Corp.’s Security Response Center today concluded its internal investigation into the SolarWinds Worldwide LLC breach, finding that although some source code was downloaded, there was no evidence hackers had abused internal systems or products to attack its users. Reports that Microsoft had been a possible victim of the SolarWinds hack first emerged Dec. 17 with the suggestion that the hackers had breached the company and then used Microsoft’s products in follow-on attacks against others. The report was denied by Microsoft President Brad Smith at the time, but to the company’s credit it then launched a full internal investigation into anything to do with SolarWinds and the hackers involved.