Catalyzes the hydrolysis of ferric enterobactin (Fe-Ent). Hydrolyzes Fe-Ent into three molecules of 2,3-dihydroxybenzoylserine (DHBS) still complexed with ferric iron. Iron reduction is necessary to obtain complete release of the metal from DHBS. It can hydrolyze salmochelin S4 (diglucosyl-C-Ent) but is not involved in iron acquisition by this siderophore. Fe(III)-enterobactin + H(+) + 3 H2O = Fe(III)-[N-(2,3-dihydroxybenzoyl)-L-serine] + 2 N-(2,3-dihydroxybenzoyl)-L-serine Fe(III)-enterobactin + H2O = Fe(III)-[N-(2,3-dihydroxybenzoyl)-L-serine]3 + H(+) Fe(III)-[N-(2,3-dihydroxybenzoyl)-L-serine]3 + H(+) + H2O = Fe(III)-[N-(2,3-dihydroxybenzoyl)-L-serine]2 + N-(2,3-dihydroxybenzoyl)-L-serine Fe(III)-[N-(2,3-dihydroxybenzoyl)-L-serine]2 + H(+) + H2O = Fe(III)-[N-(2,3-dihydroxybenzoyl)-L-serine] + N-(2,3-dihydroxybenzoyl)-L-serine Monomer. Expression is induced by the presence of enterobactin in bacterial environment. Deletion of the gene strongly inhibits Fe uptake via enterobactin. Belongs to the esterase D family.