How to perform a retrieve request to retrieve the LATEST subscribers from Salesforce?
<soap:Body>
<RetrieveRequestMsg xmlns="http://exacttarget.com/wsdl/partnerAPI">
<RetrieveRequest>
<ObjectType>Subscriber</ObjectType>
<Properties>CreatedDate</Properties>
<Properties>Client.ID</Properties>
<Properties>EmailAddress</Properties>
<Properties>SubscriberKey</Properties>
<Properties>Status</Properties>
<Properties>UnsubscribedDate</Properties>
<Properties>EmailTypePreference</Properties>
<Filter xsi:type="ns1:SimpleFilterPart" xmlns:ns1="http://exacttarget.com/wsdl/partnerAPI">
<Property>Status</Property>
<SimpleOperator>equals</SimpleOperator>
<Value>Active</Value>
</Filter>
</RetrieveRequest>
</RetrieveRequestMsg>