N.Y. Est. Powers & Trusts Law § 11-4.4

§ 11-4.4 Commencement of action against personal representatives; rule\n when some of representatives not served\n Where an action or proceeding is commenced against two or more\npersonal representatives in their representative capacities,\njurisdiction of all is obtained by service of process upon any one of\nthem and any judgment recovered may be entered and execution issued\nthereon against all of them, in their representative capacities, as if\nall had been served.\n