We have been using Trello quite extensively in my organisation, trying to reduce e-mail clutter. We have several "team-specific" boards and a single "executive" board, where a few of us discusses other teams.
Is there a way for us to easily add a person to a card located in our board, even though the person is not a member of the "executive" board? The person should be able to see only this card, similarly as if we had an e-mail discussion and added another person to it?
This is becoming a significant obstacle to us, so any help would be appreciated!