Plaintiff was a principal and a 50% shareholder of each of the closely held defendant corporations until 1996 when he executed the stock surrender, the validity of which forms the focal point of the present litigation. Given the extent of plaintiff's ownership interest and managerial involvement in defendant corporations prior to the disputed stock surrender, the motion court properly determined that the attorney-client privilege was not properly invoked by defendants to deny plaintiff access to otherwise privileged pre-surrender materials essential to the proof of his claims ( see, Tekni-Plex, Inc. v. Meyner Landis, 89 N.Y.2d 123, 138). However, as plaintiff has no right to those portions of the sought billing invoices that would reveal client confidences as to services and strategy, we exercise our own discretion ( see, e.g., Collazo v. City of New York, 213 A.D.2d 270) to extend the discovery deadline as indicated, so as to, inter alia, facilitate in camera inspection of those invoices and, where necessary, their redaction ( see, Teich v. Teich, 245 A.D.2d 41).

Concur — Williams, J.P., Lerner, Rubin and Saxe, JJ.