Allow workflows to deselect values in a multi-checkbox field
Workflows can turn on and off single checkbox custom fields. Workflows can also add checks to values in a multi-checkbox field.
But workflows cannot uncheck a value in a multi-checkbox field. Your only option is to add values, or replace all values with the ones you put in.
Would love to see this functionality improved as it would allow us to make more use of multi-checkbox fields and reduce the number of custom fields we need to create.