We are using TFS Version 15.105.25910.0 and I have created a custom state - Blocked.
In the current Sprint View, when we change a task to this state, it disappears from the board as there is no column to support blocked (makes sense).
However if I click on User Stories, I can create a blocked column and move my user stories into blocked, but cannot do this with tasks.
Is there a reason why the current iteration view does not allow the creation of a custom column and/or how do I create a view similar to User Stories for Tasks only.