Getting your organization's leaders and managers to effectively communicate change initiatives is hard work. Picture the traditional cascade. Just because you email leaders a PowerPoint doesn't mean they'll understand their communication role, or share information with their organizations or teams.
The good news is that you can provide leaders (vice presidents or department/location heads) and managers (those who supervise employees) with tools that will encourage them to communicate about essential topics. The key is to make sure toolkits provide information that's relevant and easy to understand, and that tools are designed to meet managers' needs.