Index: AXimpl/Admin/VKP/KlantLookup.cls.xml
===================================================================
diff -u -r43295 -r43342
--- AXimpl/Admin/VKP/KlantLookup.cls.xml	(.../KlantLookup.cls.xml)	(revision 43295)
+++ AXimpl/Admin/VKP/KlantLookup.cls.xml	(.../KlantLookup.cls.xml)	(revision 43342)
@@ -3,10 +3,33 @@
 <Class name="AXimpl.Admin.VKP.KlantLookup">
 <Super>TECH.Mockable</Super>
 
+<Property name="VerkoopAPI">
+<Type>DOM.VKP.VerkoopAPI</Type>
+<Private>1</Private>
+</Property>
+
+<Method name="%OnNew">
+<FormalSpec>VerkoopAPI:DOM.VKP.VerkoopAPI</FormalSpec>
+<Private>1</Private>
+<ProcedureBlock>1</ProcedureBlock>
+<ReturnType>%Status</ReturnType>
+<ServerOnly>1</ServerOnly>
+<Implementation><![CDATA[
+	Set ..VerkoopAPI = $$$Inject(VerkoopAPI,##class(DOM.DomeinContext).Instance().GeefVerkoopAPI())
+	Quit $$$OK
+]]></Implementation>
+</Method>
+
 <Method name="GeefKlantId">
 <FormalSpec>AxCustomerId:%String</FormalSpec>
 <ReturnType>DOM.VKP.VanHoeckeKlantID</ReturnType>
-<Implementation><![CDATA[		Quit ""
+<Implementation><![CDATA[
+	#dim KlantId as %String = ##class(AXimpl.AxToAdminUtils).ConvertCustomerID(AxCustomerId)
+	If ..VerkoopAPI.BestaatKlant(KlantId) {
+		Quit KlantId
+	} else {
+		Do ##class(TECH.ExceptionHandler).Throw(##class(AXimpl.Admin.DatabaseOutOfSyncException).%New(##class(AXimpl.Admin.EntiteitType).Klant(),AxCustomerId,KlantId))
+	}
 ]]></Implementation>
 </Method>
 </Class>
Index: vhUnitTest/AXimpl/Admin/VKP/KlantLookup/Test.cls.xml
===================================================================
diff -u
--- vhUnitTest/AXimpl/Admin/VKP/KlantLookup/Test.cls.xml	(revision 0)
+++ vhUnitTest/AXimpl/Admin/VKP/KlantLookup/Test.cls.xml	(revision 43342)
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Export generator="Cache" version="24">
+<Class name="vhUnitTest.AXimpl.Admin.VKP.KlantLookup.Test">
+<Super>vhUnitTest.TestCase</Super>
+
+<Method name="Test Standaard gedrag klant bestaat">
+<Implementation><![CDATA[
+	#dim VerkoopAPIMock as DOM.VKP.VerkoopAPI= ##class(vhTest.Mock.DOM.VKP.VerkoopAPI).MockInstance()
+	Set KlantLookup = ##class(AXimpl.Admin.VKP.KlantLookup).%New(VerkoopAPIMock)
+	Do VerkoopAPIMock.VerwachtMethodCall("BestaatKlant","K||1234").DanReturn($$$true)
+
+	#dim KlantId as %String = KlantLookup.GeefKlantId("01234")
+	
+	do $$$AssertEquals(KlantId,"K||1234")
+	
+	Do VerkoopAPIMock.Verifieer()
+]]></Implementation>
+</Method>
+
+<Method name="Test Standaard gedrag klant bestaat niet">
+<Implementation><![CDATA[
+	#dim Substrings = ##class(TECH.ListUtils).CreateListOfDataTypes("!!! Ernstig probleem : Klant is niet meer in sync - AxId : '01234' - AdminId : 'K||1234' !!!!")
+	Do ..ZetVerwachteExceptie(##class(Tools.Test.VerwachteExceptie).%New(##class(AXimpl.Admin.DatabaseOutOfSyncException).%ClassName($$$True),Substrings))
+
+	#dim VerkoopAPIMock as DOM.VKP.VerkoopAPI= ##class(vhTest.Mock.DOM.VKP.VerkoopAPI).MockInstance()
+	Set KlantLookup = ##class(AXimpl.Admin.VKP.KlantLookup).%New(VerkoopAPIMock)
+	Do VerkoopAPIMock.IndienMethodCall("BestaatKlant","K||1234").DanReturn($$$false)
+
+	#dim KlantId as %String = KlantLookup.GeefKlantId("01234")
+]]></Implementation>
+</Method>
+</Class>
+
+
+</Export>