sound (someone) out on (something)

Translations
разузнать (у кого-то) о (чем-то)
Before making a decision, the manager wanted to sound her team out on the new proposal.
Прежде чем принять решение, менеджер хотела разузнать у своей команды о новом предложении.
Definitions
To carefully ask someone questions or discuss a topic with them in order to find out their opinion, feelings, or intentions about something, often in a discreet or indirect way.