It replaces the values of the choice list data with that from the specified LookUp object. Uninitialized properties are cleared.
First, you usually call LookUps_Load to get an array of all entity’s choice lists, obtain an individual list, add, or delete values on the list and then pass the updated object to LookUps_Update.
Requirements
Any user can add new values to the list, but, in order to delete or replace the values, the authenticating user must belong to a group that has the Delete privilege for Projects.
Parameters
The operation uses the following parameters:
AuthenticationData : AuthenticationData, required
An AuthenticationData object containing the login information and the project ID that contains the choice list.
Entity : string, required
The entity code which choice list you want to update. Possible values:
- Bugs (defects)
 - Contacts
 - FileExchanges (shared documents)
 - FunctionalSpecs (requirements)
 - ProjectPlans
 - ProjectPlanTasks
 - ProjectTasks (agile tasks)
 - Releases
 - TestCases (legacy test cases used in release 9.6.0 and earlier)
 - TestConfigurations
 - Tests
 - TestSets
 
LookUp : LookUp, required
The LookUp object that contains the information on the choice list with updated set of values.
Result
None.
Example

Sample Code
C#
string login = "[email protected]";
string password = "p@ssword";
int projID = 10372;
// Specifying the desired entity
string entity = "Defects";
// Specifying the desired custom list
string lookUpType = "Bugs-Custom1";
								ServiceSoapClient service = new ServiceSoapClient();
// Preparing AuthenticationData
								LoginInfo loginInfo = service.GetLoginInfo("", login, password);
								AuthenticationData authData = new AuthenticationData();
								authData.AppCode = loginInfo.AppCode;
								authData.UserId = loginInfo.UserId;
								authData.PassCode = password;
								authData.DeptId = loginInfo.DeptId;
								authData.ProjId = projID;
								LookUp[] lookUps = service.LookUps_Load(authData, entity);
								LookUp lookUp = null;
foreach (LookUp templookUp in lookUps)
								{
  // Finding the desired choice list in the array
  if (templookUp.Type == lookUpType)
  {
    lookUp = templookUp;
    break;
  }
								}
if (lookUp != null)
								{
  // Specifying new values
  ArrayOfString values = lookUp.Values;
  values.Add("Users");
  values.Add("Developers");
  // Updating the choice list
  service.LookUps_Update(authData, entity, lookUp);
  Console.WriteLine("The {0} choice list is updated", lookUp.Description);
								}
else
								{
  Console.WriteLine("The LookUp type specified incorrectly");
								}
							
Java
String login = "[email protected]";
String password = "p@ssword";
int projID = 10372;
// Specifying the desired entity
String entity = "Defects";
// Specifying the desired choice list
String lookUpType = "Bugs-Custom1";
								ServiceSoap service = new Service().getServiceSoap12();
// Preparing AuthenticationData
								LoginInfo loginInfo = service.getLoginInfo("", login, password);
								AuthenticationData authData = new AuthenticationData();
								authData.setAppCode(loginInfo.getAppCode());
								authData.setUserId(loginInfo.getUserId());
								authData.setPassCode(password);
								authData.setDeptId(loginInfo.getDeptId());
								authData.setProjId(projID);
// Loading an array of LookUp objects
								List<LookUp> lookUps = service.lookUpsLoad(authData, entity).getLookUp();
								LookUp lookUp = null;
for (LookUp tempLookUp : lookUps)
								{
  // Finding the desired choice list in the array
  if (tempLookUp.getType().equals(lookUpType))
  {
    lookUp = tempLookUp;
    break;
  }
								}
if (lookUp != null)
								{
  // Specifying new values
  List<String> values = lookUp.getValues().getString();
  values.add("Customers");
  values.add("QA");
  // Updating the choice list
  service.lookUpsUpdate(authData, entity, lookUp);
  System.out.format("The %s choice list is updated", lookUp.getDescription());
								}
else
								{
  System.out.println("The LookUp type specified incorrectly");
								}

Sample Request XML
POST /psws/psws.asmx HTTP/1.1
Host: myteam.mysite.com
Content-Type: text/xml; charset=utf-8
Content-Length: 650 {Insert an appropriate value here}
SOAPAction: "http://www.pragmaticsw.com/LookUps_Update"
 
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <LookUps_Update xmlns="http://www.pragmaticsw.com/">
      <AuthenticationData>
        <AppCode>agSP</AppCode>
        <DeptId>7154</DeptId>
        <ProjId>1032</ProjId>
        <UserId>25315</UserId>
        <PassCode>p@ssword</PassCode>
      </AuthenticationData>
      <Entity>Defects</Entity>
      <LookUp>
        <Type>Bugs-Custom1</Type>
        <Description>Defect - Found In Build</Description>
        <Values>
          <string>Customers</string>
          <string>QA</string>
        </Values>
      </LookUp>
    </LookUps_Update>
  </soap:Body>
</soap:Envelope>
SOAP 1.2
POST /psws/psws.asmx HTTP/1.1
Host: myteam.mysite.com
Content-Type: application/soap+xml; charset=utf-8
Content-Length: 658 {Insert an appropriate value here}
 
<?xml version="1.0" encoding="utf-8"?>
<soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
  <soap12:Body>
    <LookUps_Update xmlns="http://www.pragmaticsw.com/">
      <AuthenticationData>
        <AppCode>agSP</AppCode>
        <DeptId>7154</DeptId>
        <ProjId>1032</ProjId>
        <UserId>25315</UserId>
        <PassCode>p@ssword</PassCode>
      </AuthenticationData>
      <Entity>Defects</Entity>
      <LookUp>
        <Type>Bugs-Custom1</Type>
        <Description>Defect - Found In Build</Description>
        <Values>
          <string>Customers</string>
          <string>QA</string>
        </Values>
      </LookUp>
    </LookUps_Update>
  </soap12:Body>
</soap12:Envelope>

Sample Response XML
HTTP/1.1 200 OK
Content-Type: text/xml; charset=utf-8
Content-Length: 308 {The server returns an appropriate value here}
 
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <LookUps_UpdateResponse xmlns="http://www.pragmaticsw.com/" />
  </soap:Body>
</soap:Envelope>
SOAP 1.2
HTTP/1.1 200 OK
Content-Type: application/soap+xml; charset=utf-8
Content-Length: 318 {The server returns an appropriate value here}
 
<?xml version="1.0" encoding="utf-8"?>
<soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 		xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
  <soap12:Body>
    <LookUps_UpdateResponse xmlns="http://www.pragmaticsw.com/" />
  </soap12:Body>
</soap12:Envelope>