The importance of complying with organizational brand guidelines in corporate communications can vary depending on where you work, but most companies want to aim for consistency in both the tone and the look of their communications.
Having a brand center on your intranet supports this. Include brand guidelines on how to write and present content to other employees and also to clients, with reference to visual guidelines. Also consider including information on related processes, such as how to order branded goods or where to get advice on messaging from communications professionals. Where possible include access to related digital assets such as logos, imagery, presentation templates and so on.