But when it updates or upgrades products legal obligations "may in some circumstances require that we maintain the ability to provide information in response to a law enforcement or national security request," Microsoft said. "There are aspects of this debate that we wish we were able to discuss more freely. That's why we've argued for additional transparency that would help everyone understand and debate these important issues," it said in a statement.
Internet companies like Facebook, Yahoo, Apple, and Microsoft have so far released aggregate figures for data requests from the government, but didn't say how many were related to national security. Yahoo said it could not break out requests under FISA, because those figures were classified.
The government had previously said it did not object to Yahoo's request for release of the court documents and offered to conduct a classification review at the court's request.
"We encourage every company that has opposed a FISA order or directive to move to unseal their oppositions so the public will have a better understanding of how they've fought for their users," rights group Electronic Frontier Foundation said in a post.