How can I add a member to the task without adding him to the board?
Or how can I hide all the other tasks in a board from the member?
Hey Dmitriy
In order for a member to be assigned to a card, they need to also be a member of the board. It's not possible to hide other cards or lists from certain users on a board. When a person is a member of the board, they will see all cards on that board.
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