Heat oven to 350°F (325°F for dark or nonstick pan). Grease or spray bottom only of 13x9-inch pan.
In large bowl, beat cake mix, reserved pineapple juice, water, oil and eggs on low speed 2 minutes, scraping bowl occasionally (do not overbeat); stir in 2 teaspoons orange peel. Pour into pan.
Bake as directed on box for 13x9-inch pan. Run knife around sides of pan to loosen cake. Cool completely, about 1 hour.
In medium bowl, stir together frosting, pineapple, 1/4 cup coconut and 2 teaspoons orange peel. Spread frosting mixture over top of cake. Garnish with additional coconut and strawberries. Store loosely covered.
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