Currently if a disk that has been whole disk encrypted with Symantec Encryption Desktop needs to be decommissioned it is necessary to use a third party utility such as Darik's Boot And Nuke (DBAN).
There is no utility available to delete only the records containing user and key data from the disk. Such a utility would make the data on the disk unrecoverable and would be quick to run.
Symantec Corporation is committed to product quality and satisfied customers. This Feature Request is currently being considered by Symantec Corporation to be addressed in a forthcoming version of the product.
Technical Support filed a Feature Request to add this product feature. Note that an feature request is exactly that, a request. There is no committed date for this request from the Endpoint Encryption Product Management team, nor from the Endpoint Encryption Engineering team at this time.
Please be sure to refer back to this document periodically as any changes to the status of the request will be reflected here.