This method Mail-disables an existing contact by removing the
Exchange attributes of the contact. The contact is not deleted.
The owning organization dn is retrieved from the contact's
The dn of the organization's Global Address List (GAL) is
retrieved from otherWellKnownObjects on the organization object and
the entry matching that GAL is removed from the showInAddressBook
property of the contact. This process is repeated for the
This method removes the organization from the
otherWellKnownObjects of the contact.
The caller must be at least a member of role: UserCreators.