Is a lawsuit against a state official that challenges the constitutionality of that official's action barred by the Eleventh Amendment?

A suit against a state official that challenges the constitutionality of that official's action is not barred by the Eleventh Amendment, unless it "is in fact a suit against [the] State." Id.; see Ex parte Young, 209 U.S. 123 (1908). The relief available in such suits, however, is limited to prospective relief; retroactive relief--money damages for past injuries--is barred by the Eleventh Amendment where those damages will be paid from the state treasury. Edelman v. Jordan, 415 U.S. 651 (1974).