“This court has observed that it is well-established law that “a solicitor of record has the ostensible authority to bind his or her clients and that opposing counsel are entitled to rely upon that authority in the absence of some indication to the contrary”: Oliveira v. Tarjay Investments Inc., [2006] O.J. No. 1109, at para. 2 (C.A.), referring to Scherer v. Paletta, 1996 CanLII 286 (ON CA), [1966] 2 O.R. 524 (C.A.) and Mohammed v. York Fire and Casualty Insurance Co., 2006 CanLII 3954 (ON CA), [2006] O.J. No. 547, at para. 20 (C.A.).”