The Data Classification ID is the GUID value that identifies the data classification and is generated when a new data classification is added and the host property is saved.

A data classification ID becomes associated with a backup image by setting the Data Classification attribute in the policy dialog box. The ID is written into the image header. The storage lifecycles use the ID to identify the images that are associated with classification.

See Data classifications policy attribute.

ID values can exist in image headers indefinitely, so data classifications cannot be deleted. The name, description, and rank can change without changing the identity of the data classification.