In a small saucepan, combine broth and mushrooms; bring to a boil. Remove from the heat; let stand for 15-20 minutes or until mushrooms are softened. Using a slotted spoon, remove mushrooms; coarsely chop. Strain remaining broth through a fine mesh strainer. Set aside mushrooms and broth.
In a large skillet, saute onion in butter until softened. Reduce heat to medium-low; cook, stirring occasionally, for 10 minutes or until golden brown. Add the tarragon, salt, pepper and reserved mushrooms and broth. Bring to a boil; cook over medium heat until liquid is evaporated.
On a lightly floured surface, unfold puff pastry. Roll each sheet into a 12-in. x 10-in. rectangle; cut each into 2 pieces. Transfer to a greased baking sheet. Spoon mushroom mixture onto each pastry; top with turkey and cream cheese.
Lightly brush pastry edges with water. Bring long sides over filling, pinching seams and ends to seal. Turn pastries seam side down. Cut small slits into pastry. Brush tops with egg. Bake at 400° for 20-25 minutes or until golden brown.
Meanwhile, in a small saucepan, combine the broth, wine and vinegar. Bring to a boil; cook until liquid is reduced by half. Stir in cranberry sauce until melted. Serve with pastries.