When the user sets a manager of this item we need to make this item editable to selected manager. I'm doing this using Sharepoint Designer Workflow (2010 with impersonation step) by adding EDIT permission to selected manager.
But even if the user is visible on permissions list with correctly set permissions he can't edit this Item.
Access denied. You do not have permission to perform this action or access this resource. error.
Am I missing something here?