Spanish to English Bus/Financial Other letter concerning payments/grants by a Trust

I can't manage to make any sense of the sentance without turning it all around, but I'm worried that I may have changed the meaning.

Noto que en los correos, documentación e información relacionada con
el Fideicomiso *que ustedes envían, copian y hacen participe a NA*,
desconozco cual es su función o participación en el fideicomiso. Me
puede orientar?

My rendering:
I note that you involve NA in the letters, documentation and information relating to the Trust that you send and copy. I do not know what his function is or how he is involved in the trust.

Any remarks welcomed.