Sample Salesforce Enterprise SOAP login

This is a sample SOAP Login using Enterprise WSDL. Note that we are not passing any header information here for the sake of example.

<soapenv:Envelope 
        xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" 
    xmlns:urn="urn:enterprise.soap.sforce.com">
   <soapenv:Header>
   </soapenv:Header>
   <soapenv:Body>
      <urn:login>
         <urn:username>replace this with our SFDC username</urn:username>
         <urn:password>password + security token</urn:password>
      </urn:login>
   </soapenv:Body>
</soapenv:Envelope>

Below is the sample SOAP response:

<soapenv:Envelope 
     xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" 
     xmlns="urn:partner.soap.sforce.com" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <soapenv:Body>
      <loginResponse>
         <result>
            <metadataServerUrl>
               https://na5.salesforce.com/services/Soap/m/30.0/00D700000008fqn
            </metadataServerUrl>
            <passwordExpired>false</passwordExpired>
            <sandbox>false</sandbox>
            <serverUrl>
              https://na5.salesforce.com/services/Soap/u/30.0/00D700000008fqn
             </serverUrl>
            <sessionId>REMOVED</sessionId>
            <userId>005700000012RyAAAU</userId>
            <userInfo>
               <accessibilityMode>false</accessibilityMode>
               <currencySymbol>$</currencySymbol>
               <orgAttachmentFileSizeLimit>5242880</orgAttachmentFileSizeLimit>
               <orgDefaultCurrencyIsoCode>USD</orgDefaultCurrencyIsoCode>
               <orgDisallowHtmlAttachments>false</orgDisallowHtmlAttachments>
               <orgHasPersonAccounts>true</orgHasPersonAccounts>
               <organizationId>00D700000008fqnEAA</organizationId>
               <organizationMultiCurrency>false</organizationMultiCurrency>
               <organizationName>REMOVED</organizationName>
               <profileId>00e70000000sEkZAAU</profileId>
               <roleId>00E70000000olJBEAY</roleId>
               <sessionSecondsValid>7200</sessionSecondsValid>
               <userDefaultCurrencyIsoCode xsi:nil="true"/>
               <userEmail>REMOVED/userEmail>
               <userFullName>REMOVED</userFullName>
               <userId>005700000012RyAAAU</userId>
               <userLanguage>en_US</userLanguage>
               <userLocale>en_US</userLocale>
               <userName>REMOVED</userName>
               <userTimeZone>America/Los_Angeles</userTimeZone>
               <userType>Standard</userType>
               <userUiSkin>Theme3</userUiSkin>
            </userInfo>
         </result>
      </loginResponse>
   </soapenv:Body>
</soapenv:Envelope>

NOTE:

The following is important on your succeeding calls using SOAP

• sessionId: This is the value you would need to pass to succeeding SOAP calls as this proves that you are authenticated.
• serverUrl:  This will be the URL you will need to post succeeding SOAP calls.

please see my blogpost for doing SOAP integration using Partner WSDL.