Microsoft on Thursday won its nearly four-year battle against a New York district court judge's warrant requiring it to turn over customer emails held on a server in Ireland. Microsoft had complied with demands to turn over account information stored on its servers in the United States, but it had refused to give up the emails themselves, contending a U.S. judge did not have the authority to issue warrants for information stored abroad. Microsoft two years ago lost its bid to vacate the warrant, and it subsequently lost an appeal.