Encryption Keys assigned to registered workstations using the Mailbox Importer can be revoked at a later time. Doing so may help keep your information secure. Revoking an Encryption Key will clear the Username and Password fields in the Mail Account settings dialog:
The assigned Workstation will remain associated with the account after key revocation. For more information on the Account Settings dialog, refer to Adding an IMAP, POP3, or EWS Account.
CAUTION:
Revoking an Encryption Key will invalidate any accounts associated with the key in question.