Many people know that it is safe to defrost a whole turkey in the microwave, if the turkey is immediately transferred to a hot grill or oven to finish cooking. On the defrost power level it takes about 10 to 12 minutes per pound to defrost. But you can also cook a turkey successfully in the microwave oven – whole or in parts. Timing can vary because of the wattage of microwaves, so always follow the recommendations of your user’s manual before beginning. Most microwaves will not accommodate more than a 12 to 14 pound turkey. A cooking bag is recommended to help in even cooking. Do not microwave a stuffed turkey; cook the stuffing in a separate casserole. At 50 percent power level, it will take about 9 to 10 minutes per pound for your turkey to cook. Rotate the turkey often. The turkey should be done and safe to consume when the internal temperature reaches 165 degrees Fahrenheit in the innermost part of the thigh and wing and the thickest part of the breast. The turkey should stand about 20 minutes before carving. Turkey parts may also be cooked in the microwave oven. Breasts take 10 to 15 minutes per pound; and drumsticks, wings, and thighs about 13 to 16 minutes per pound. Even though the turkey may not be as brown as that you roast, it will be moist and flavorful.

Reference: http://www.fsis.usda.gov/Fact_Sheets/turkey_from_farm_to_table/index.asp

Source: Sandra Bastin, Extension Specialist for Food and Nutrition, University of Kentucky College of Agriculture