в своём кабинете

in their own office

→ в
phrase Rare #42,050
in their own office The possessive refers to the subject of the sentence, so the English translation may be “his,” “her,” or “their” own office.
RU: Она ждёт врача в своём кабинете.
EN: She is waiting for the doctor in her own office.

Его, как правило, нет дома, или он сидит в своём кабинете.

As a rule, he’s either not at home or sitting in his study.

— Вожделение (2007)

Когда это закончится, я хочу видеть вас всех троих в своём кабинете.

When this is over, I want all three of you in my office.

— Дзета (2026)

Шериф ждёт вас в своём кабинете.

The sheriff is waiting for you in his office.

Думаю, Том в своём кабинете.

I think Tom is in his office.