That was a different, male Captain Shelby. However, Shelby and her first officer appeared on screen in LD 2x05 "An Embarrassment of Dooplers" .The latter I thought. If she's a Fleet Admiral she probably would have been a flag officer during the Enterprise-E's lifetime.
Her last canonical reference was captain of the Sutherland during the Dominion War (Dax and Worf's wedding to be precise).