I do not trust anybody in this office

Nobody is trusted by me in this office

Nobody was trusted by me in this office

Nobody should be trusted by me in this office

Nobody will be trusted by me in this office

All of the above

This is a sentence of Present Indefinite Tense.

Present Indefinite Tense

Active Voice: Subject + Verb + Object

Passive Voice: Object + is/am/are+ third form of a verb + by + subject.