Microsoft Corp has helped U.S. intelligence service intercept users’ communication, Reuters reports.
The software company also permitted the NSA to circumvent email encryption to gain access to users.
The information comes from documents released to the Guardian by NSA leaker Edward Snowden.
Among the communication collected was conversations on Skype, an online chat service.
Microsoft denied the reports.
“To be clear, Microsoft does not provide any government with blanket or direct access to SkyDrive, Outlook.com, Skype or any Microsoft product,” the company said in a statement on its website.