By Joseph Menn SAN FRANCISCO (Reuters) – Microsoft Corp pledged late Wednesday to fight in court any attempt by U.S. intelligence agencies to seize its foreign business customers data under American surveillance laws, one of a series of steps aimed at reassuring nervous users abroad. We are committing contractually to not turning it over without litigating that issue, Microsoft General Counsel Brad Smith said in an interview. However, Microsoft has turned over data on non-U.S.-based individuals using its email and other services, as required under FISA laws. Microsoft and other companies are suing the government for the right to disclose how frequently that happens.