Possible Dying Tree
I have a Leyland Cyprus and the tip of most of the branches are getting brown and brittle. This tree is four years old and has been in good shape up until now.
Certified GKH Gardening Expert
This article will help determine if the tree is dead or dying: https://www.gardeningknowhow.com/ornamental/trees/tgen/what-does-a-dying-tree-look-like-signs-that-a-tree-is-dying.htm