In United Stationers Supply Co. v. Zurich American Insurance Co., 386 Ill. App. 3d 88, 896 N.E.2d 425, 324 Ill. Dec. 639 (2008), the plaintiff filed a declaratory judgment action alleging that the insurer breached its duty to defend it in an underlying action and, thus, was estopped from raising policy defenses. The Court concluded that the plaintiff in United Stationers was not an additional insured under the policy, and in light of that finding, the Court did not reach the other issues raised by the plaintiff, including the question of whether the insurer was estopped from raising policy defenses. United Stationers, 386 Ill. App. 3d at 105-06.