deliver an ultimatum

Translations
предъявить ультиматум
The manager had to deliver an ultimatum to the team about meeting deadlines.
Менеджеру пришлось предъявить ультиматум команде о соблюдении сроков.
Definitions
To present a final demand or statement of terms, the rejection of which may lead to severe consequences or the end of a relationship or negotiation.