1.5 Prerequisites/Preconditions

The endpoint URL that is returned by either the Autodiscover Publishing and Lookup SOAP-Based Web Service Protocol, as described in [MS-OXWSADISC], or the Autodiscover Publishing and Lookup Protocol, as described in [MS-OXDSCLI], is a required to form the HTTP request to the Web server that hosts this protocol. The operations that this protocol uses cannot be accessed unless the correct endpoint that services the target mailbox is identified for the HTTP Web requests that target the Voice Mail Settings Web Service Protocol operations.

The Unified Messaging service has to be enabled in order for many of the operations that are associated with this protocol to function. Additionally, for operations that initiate playing items on the phone, such as the PlayOnPhone and the PlayOnPhone2 operations, the item identifiers of the items or voice mails have to be obtained before these operations can be used.

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