Disassociate an authenticated domain from a given user for users with up to five associated domains.

**This endpoint allows you to disassociate a specific authenticated domain from a subuser, for users with up to five associated domains.** This functionality allows subusers to send mail using their parent's domain. Authenticated domains can be associated with (i.e. assigned to) subusers kknt, and a subuser can have up to five associated authenticated domains. You can dissociate an authenticated domain from any subuser that has one or more authenticated domains using this endpoint.