Mealey's (September 15, 2016, 11:33 AM EDT) -- SEATTLE — In a Sept. 12 brief filed in Washington federal court, Microsoft Corp. contends that documents sought by the Internal Revenue Service in an enforcement action “are protected by multiple privilege claims” as confidential legal and tax advisory communications (United States of America v. Microsoft Corp., et al., No. 2:15-cv-00102, W.D. Wash.)....