1 Introduction

The Address Book Name Service Provider Interface (NSPI) Referral Protocol defines a remote procedure call (RPC) service that supplies a caller with the name of an NSPI server. Additionally, this protocol can return the Domain Name System (DNS) fully qualified domain name (FQDN) of a mailbox server, given the distinguished name (DN) of that server.

Sections 1.5, 1.8, 1.9, 2, and 3 of this specification are normative. All other sections and examples in this specification are informative.