"From this point forward all Bajoran personnel should not be allowed to work without having a Federation or other non-Bajoran personnel beside them. From my understanding of the timeline you have already been infiltrated. Ideally all Bajoran personnel should be quarantined on Bajor until Origin is defeated, I know Bajor's government won't stand for that." While Morningstar is talking with Sisko and Kira she was communicating with her wife with a series of taps over a two way communication system from the future. 

Masters responds back with an affirmative. She contacts the guests "Spartans, Nomad arm yourselves and scan the station for anything unusual. Yes I know pretty much everything is unusual to you in this universe, but our scanners will pick up the unusual for you, relay everything to me. When you find it, have our teleporter chief teleport you there immediately. Neutralize all threats, do not kill. They are no use to us dead." She then contacts the teleporter chief and gives the order to do as the guests may order or demand.