I'll let him/her know
Se lo haré saber a Tom.
I'll let Tom know.
Buscaré a Tom y se lo haré saber.
I’ll look for Tom and let him know.
Encontraré a Tom y se lo haré saber.
I’ll find Tom and let him know.
Se lo haré saber.
I'll let him know.
— Cónclave (2024)