request.xml

<?xml version="1.0"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <soap:Header>
        <RequestServerVersion Version="Exchange2013" xmlns="http://schemas.microsoft.com/exchange/services/2006/types" />
    </soap:Header>
    <soap:Body>
        <FindPeople xmlns="http://schemas.microsoft.com/exchange/services/2006/messages">
            <PersonaShape>
                <BaseShape xmlns="http://schemas.microsoft.com/exchange/services/2006/types">Default</BaseShape>
            </PersonaShape>
            <IndexedPageItemView MaxEntriesReturned="10000" Offset="0" BasePoint="Beginning" />
            <ParentFolderId>
                <AddressListId Id="edit_yourself_i_will_autodetect_later" xmlns="http://schemas.microsoft.com/exchange/services/2006/types" />
            </ParentFolderId>
        </FindPeople>
    </soap:Body>
</soap:Envelope>