| References to Web policy content are only available when a Web Gateway is included in the peer group. | 
You can delete a Message Annotation if you no longer need it.
| 
 | You cannot delete a Message Annotation that is referenced in a content rule. | 
From the Policy Center Home page, click Message Annotations. The Manage Message Annotations page appears, listing the existing Message Annotations.
Select the Message Annotation you wish to delete.
| Before deleting your selected Message Annotation, you should ensure that no content rules are using it: 
 | 
| When you have finished modifying your content security policy you must apply the configuration for any changes 
 to take effect.   If the  |