diff --git a/xta-adapter/src/main/java/de/ozgcloud/eingang/xta/WsHeaderAddingInterceptor.java b/xta-adapter/src/main/java/de/ozgcloud/eingang/xta/WsHeaderAddingInterceptor.java
index a685b0a20bfc5a93b90dcd606cebb2dea31e8187..3833376fc82fb34588edd7896fb245893544a80e 100644
--- a/xta-adapter/src/main/java/de/ozgcloud/eingang/xta/WsHeaderAddingInterceptor.java
+++ b/xta-adapter/src/main/java/de/ozgcloud/eingang/xta/WsHeaderAddingInterceptor.java
@@ -11,7 +11,7 @@ import de.ozgcloud.eingang.common.errorhandling.TechnicalException;
 import eu.osci.ws._2014._10.transport.OriginatorsType;
 import eu.osci.ws._2014._10.transport.PartyIdentifierType;
 import eu.osci.ws._2014._10.transport.PartyType;
-import jakarta.validation.Valid;
+
 import jakarta.xml.bind.JAXBContext;
 import jakarta.xml.bind.JAXBElement;
 import jakarta.xml.bind.JAXBException;
@@ -20,8 +20,7 @@ import jakarta.xml.bind.JAXBException;
 class WsHeaderAddingInterceptor implements ClientInterceptor {
 
 	@Autowired
-	@Valid
-	private XtaProperties properties;
+	private XtaCurrentIdentifierService xtaCurrentIdentifierService;
 
 	@Override
 	public boolean handleRequest(MessageContext messageContext) throws WebServiceClientException {
@@ -44,7 +43,7 @@ class WsHeaderAddingInterceptor implements ClientInterceptor {
 
 		PartyType partyType = new PartyType();
 		PartyIdentifierType identifier = new PartyIdentifierType();
-		identifier.setValue(properties.getIdentifier());
+		identifier.setValue(xtaCurrentIdentifierService.getCurrentIdentifier());
 		partyType.setIdentifier(identifier);
 
 		var origin = new OriginatorsType();
diff --git a/xta-adapter/src/main/java/de/ozgcloud/eingang/xta/XtaCurrentIdentifierService.java b/xta-adapter/src/main/java/de/ozgcloud/eingang/xta/XtaCurrentIdentifierService.java
new file mode 100644
index 0000000000000000000000000000000000000000..0024ec287a64691c8ece083c10ee19ac262ac897
--- /dev/null
+++ b/xta-adapter/src/main/java/de/ozgcloud/eingang/xta/XtaCurrentIdentifierService.java
@@ -0,0 +1,28 @@
+package de.ozgcloud.eingang.xta;
+
+import java.util.List;
+
+import jakarta.validation.Valid;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Service
+public class XtaCurrentIdentifierService {
+
+	@Setter
+	@Getter
+	private String currentIdentifier = "*";
+
+	@Autowired
+	@Valid
+	private XtaProperties properties;
+
+	public List<String> getIdentifiers() {
+		return properties.getIdentifiers();
+	}
+
+}
diff --git a/xta-adapter/src/main/java/de/ozgcloud/eingang/xta/XtaProperties.java b/xta-adapter/src/main/java/de/ozgcloud/eingang/xta/XtaProperties.java
index 2f31999ff99e8d9e997a8e57b6ee2b6260855beb..23a4e4bcc030f56f017200536653a3fca84c44d4 100644
--- a/xta-adapter/src/main/java/de/ozgcloud/eingang/xta/XtaProperties.java
+++ b/xta-adapter/src/main/java/de/ozgcloud/eingang/xta/XtaProperties.java
@@ -2,6 +2,7 @@ package de.ozgcloud.eingang.xta;
 
 import java.math.BigInteger;
 import java.net.URI;
+import java.util.List;
 
 import jakarta.validation.constraints.NotEmpty;
 import jakarta.validation.constraints.NotNull;
@@ -31,7 +32,7 @@ class XtaProperties {
 	private KeyStore keyStore;
 	private Actions actions;
 	@NotEmpty
-	private String identifier;
+	private List<String> identifiers;
 }
 
 @Validated
diff --git a/xta-adapter/src/main/java/de/ozgcloud/eingang/xta/XtaService.java b/xta-adapter/src/main/java/de/ozgcloud/eingang/xta/XtaService.java
index 2341fbf6dc93899cb0c195ee6f09be52266c5c81..ae71ea062381ed78d7c32bb211100af55b55ed86 100644
--- a/xta-adapter/src/main/java/de/ozgcloud/eingang/xta/XtaService.java
+++ b/xta-adapter/src/main/java/de/ozgcloud/eingang/xta/XtaService.java
@@ -4,14 +4,13 @@ import java.util.Spliterators;
 import java.util.stream.Stream;
 import java.util.stream.StreamSupport;
 
-import de.ozgcloud.eingang.common.vorgang.VorgangNummerSupplier;
-import de.ozgcloud.eingang.xdomea.XdomeaMessageDataMapper;
-import lombok.RequiredArgsConstructor;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
 import de.ozgcloud.eingang.common.formdata.FormData;
+import de.ozgcloud.eingang.common.vorgang.VorgangNummerSupplier;
+import de.ozgcloud.eingang.xdomea.XdomeaMessageDataMapper;
 import lombok.NonNull;
 import lombok.extern.log4j.Log4j2;
 
@@ -31,12 +30,20 @@ class XtaService {
 	private XdomeaMessageDataMapper xdomeaMessageDataMapper;
 	@Autowired
 	private XtaIncomingFilesMapper xtaIncomingFilesMapper;
+	@Autowired
+	private XtaCurrentIdentifierService service;
 
 	public Stream<FormData> getMessages() {
 		return createXtaMessageStream().filter(this::isSupportedMessageType).map(this::getFormData);
 	}
 
 	Stream<XtaMessageMetaData> createXtaMessageStream() {
+		return service.getIdentifiers().stream()
+				.flatMap(this::createXtaMessageStreamForIdentifier);
+	}
+
+	private Stream<XtaMessageMetaData> createXtaMessageStreamForIdentifier(String identifier) {
+		service.setCurrentIdentifier(identifier);
 		var iterator = new XtaMessageMetadataRemoteIterator(remoteService);
 		return StreamSupport.stream(Spliterators.spliteratorUnknownSize(iterator, 0), false);
 	}
diff --git a/xta-adapter/src/main/resources/application-local.yml b/xta-adapter/src/main/resources/application-local.yml
index 83e7b8ca8d1088a6fcbae18446b9ac917d21f942..b35125c65bce0ce95de34f97fb97c398bbcefc15 100644
--- a/xta-adapter/src/main/resources/application-local.yml
+++ b/xta-adapter/src/main/resources/application-local.yml
@@ -1,6 +1,7 @@
 ozgcloud:
   xta:
-    identifier: gae:jens.reese@mgm-tp.com
+    identifiers:
+      - gae:jens.reese@mgm-tp.com
     server:
       address: localhost:3000
       name: LI33-0005
diff --git a/xta-adapter/src/test/helm/xta_adapter_cronjob_basic_test.yaml b/xta-adapter/src/test/helm/xta_adapter_cronjob_basic_test.yaml
index 3e4e37b8fe3f8ad0fce65be7a136aa3b8219431c..7eac13e81398613f23cc5e4dedc3309b69030c5a 100644
--- a/xta-adapter/src/test/helm/xta_adapter_cronjob_basic_test.yaml
+++ b/xta-adapter/src/test/helm/xta_adapter_cronjob_basic_test.yaml
@@ -60,7 +60,8 @@ tests:
       image.name: xta-adapter
       xta:
         schedule: "1 1 * * * *"
-        identifier: gae:test@ozg-sh.de
+        identifiers:
+          - gae:test@ozg-sh.de
         server: 
           address: 1.2.3.4
           name: test
@@ -144,4 +145,4 @@ tests:
           path: spec.jobTemplate.spec.template.spec.containers[0].securityContext.capabilities
           value:
             drop:
-              - ALL
\ No newline at end of file
+              - ALL
diff --git a/xta-adapter/src/test/helm/xta_adapter_cronjob_env_test.yaml b/xta-adapter/src/test/helm/xta_adapter_cronjob_env_test.yaml
index 4e84137ff94e27f91f7786522f65e9ff5b52d380..213a9de09e759a97343231a35201d5a4c6598962 100644
--- a/xta-adapter/src/test/helm/xta_adapter_cronjob_env_test.yaml
+++ b/xta-adapter/src/test/helm/xta_adapter_cronjob_env_test.yaml
@@ -36,7 +36,8 @@ tests:
     set:
       image.name: xta-adapter
       xta:
-        identifier: gae:test@ozg-sh.de
+        identifiers:
+          - gae:test@ozg-sh.de
         server:
           name: test
           address: 1.2.3.4
@@ -116,7 +117,8 @@ tests:
       image.name: xta-adapter
       env.overrideSpringProfiles: local
       xta:
-        identifier: gae:test@ozg-sh.de
+        identifiers:
+          - gae:test@ozg-sh.de
         server:
           name: test
           address: 1.2.3.4
@@ -154,4 +156,4 @@ tests:
           path: spec.jobTemplate.spec.template.spec.containers[0].env
           content:
             name: grpc_client_vorgang-manager-vorgang-manager_negotiationType
-            value: "TLS"
\ No newline at end of file
+            value: "TLS"
diff --git a/xta-adapter/src/test/helm/xta_adapter_cronjob_volumes_test.yaml b/xta-adapter/src/test/helm/xta_adapter_cronjob_volumes_test.yaml
index 7af81adc1e39cc206f113ab1e00415b147a65f99..352f196bf1b8a8cafccb6fa868e8da0efe595636 100644
--- a/xta-adapter/src/test/helm/xta_adapter_cronjob_volumes_test.yaml
+++ b/xta-adapter/src/test/helm/xta_adapter_cronjob_volumes_test.yaml
@@ -36,7 +36,8 @@ tests:
     set:
       image.name: xta-adapter
       xta:
-        identifier: gae:test@ozg-sh.de
+        identifiers:
+          - gae:test@ozg-sh.de
         server:
           name: test
           address: 1.2.3.4
@@ -66,7 +67,8 @@ tests:
     set:
       image.name: xta-adapter
       xta:
-        identifier: gae:test@ozg-sh.de
+        identifiers:
+          - gae:test@ozg-sh.de
         server:
           name: test
           address: 1.2.3.4
diff --git a/xta-adapter/src/test/java/de/ozgcloud/eingang/xta/XtaActiveIdentifierServiceTest.java b/xta-adapter/src/test/java/de/ozgcloud/eingang/xta/XtaActiveIdentifierServiceTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..ae5b12b2bab4b3a8b5d6a106db2ed7ad8481c269
--- /dev/null
+++ b/xta-adapter/src/test/java/de/ozgcloud/eingang/xta/XtaActiveIdentifierServiceTest.java
@@ -0,0 +1,44 @@
+package de.ozgcloud.eingang.xta;
+
+import static org.assertj.core.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+import java.util.List;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.Spy;
+
+class XtaActiveIdentifierServiceTest {
+
+	private static final String IDENTIFIER1 = "identifier1";
+	private static final String IDENTIFIER2 = "identifier2";
+	private static final List<String> IDENTIFIERS = List.of(IDENTIFIER1, IDENTIFIER2);
+
+	@Spy
+	@InjectMocks
+	private XtaCurrentIdentifierService service;
+
+	@Mock
+	private XtaProperties properties;
+
+	@DisplayName("get identifiers")
+	@Nested
+	class TestGetIdentifiers {
+		@BeforeEach
+		void mock() {
+			when(properties.getIdentifiers()).thenReturn(IDENTIFIERS);
+		}
+
+		@DisplayName("should return")
+		@Test
+		void shouldReturn() {
+			assertThat(service.getIdentifiers()).isEqualTo(IDENTIFIERS);
+		}
+	}
+
+}
diff --git a/xta-adapter/src/test/java/de/ozgcloud/eingang/xta/XtaServiceTest.java b/xta-adapter/src/test/java/de/ozgcloud/eingang/xta/XtaServiceTest.java
index 75a00a6610db89ffeaed0ba620d4676038fda296..997ce3bf36df47953077bbda509fc1f68705f83f 100644
--- a/xta-adapter/src/test/java/de/ozgcloud/eingang/xta/XtaServiceTest.java
+++ b/xta-adapter/src/test/java/de/ozgcloud/eingang/xta/XtaServiceTest.java
@@ -8,6 +8,7 @@ import java.util.List;
 import java.util.stream.Stream;
 
 import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
 import org.mockito.ArgumentCaptor;
@@ -19,8 +20,8 @@ import org.mockito.Spy;
 import de.ozgcloud.eingang.common.formdata.IncomingFileTestFactory;
 import de.ozgcloud.eingang.common.vorgang.VorgangNummerSupplier;
 import de.ozgcloud.eingang.xdomea.XdomeaMessageData;
-import de.ozgcloud.eingang.xdomea.XdomeaMessageDataTestFactory;
 import de.ozgcloud.eingang.xdomea.XdomeaMessageDataMapper;
+import de.ozgcloud.eingang.xdomea.XdomeaMessageDataTestFactory;
 
 class XtaServiceTest {
 
@@ -43,6 +44,9 @@ class XtaServiceTest {
 	@Mock
 	private XdomeaMessageDataMapper xdomeaMessageDataMapper;
 
+	@Mock
+	private XtaCurrentIdentifierService currentIdentifierService;
+
 	@Nested
 	class TestGetMessagesAsFormData {
 
@@ -124,7 +128,7 @@ class XtaServiceTest {
 		private ArgumentCaptor<XtaMessageMetaData> messageMetaDataCaptor;
 
 		@Captor
-		private ArgumentCaptor<XdomeaMessageData>  classificationCaptor;
+		private ArgumentCaptor<XdomeaMessageData> classificationCaptor;
 
 		@BeforeEach
 		void init() {
@@ -185,4 +189,46 @@ class XtaServiceTest {
 		}
 	}
 
+	@DisplayName("create XTA message stream")
+	@Nested
+	class TestCreateXtaMessageStream {
+		private static final List<String> XTA_IDENTIFIERS = List.of("XTA_IDENTIFIER", "XTA_IDENTIFIER2");
+
+		@Captor
+		private ArgumentCaptor<String> identifierCaptor;
+
+		@BeforeEach
+		void mock() {
+			when(remoteService.getMessagesMetadata())
+					.thenReturn(XtaMessageMetaDatasAndHeaderTestFactory.create())
+					.thenReturn(XtaMessageMetaDatasAndHeaderTestFactory.create());
+			when(currentIdentifierService.getIdentifiers()).thenReturn(XTA_IDENTIFIERS);
+		}
+
+		@DisplayName("should return")
+		@Test
+		void shouldReturn() {
+			var result = service.createXtaMessageStream().toList();
+
+			assertThat(result).isEqualTo(getExpectedMessages());
+		}
+
+		private List<XtaMessageMetaData> getExpectedMessages() {
+			return Stream.concat(
+					XtaMessageMetaDatasAndHeaderTestFactory.create().getMessages(),
+					XtaMessageMetaDatasAndHeaderTestFactory.create().getMessages()
+			).toList();
+		}
+
+		@DisplayName("should call set current identifier")
+		@Test
+		void shouldCallSetCurrentIdentifier() {
+			service.createXtaMessageStream().toList();
+
+			verify(currentIdentifierService, times(2))
+					.setCurrentIdentifier(identifierCaptor.capture());
+			assertThat(identifierCaptor.getAllValues()).isEqualTo(XTA_IDENTIFIERS);
+		}
+	}
+
 }
diff --git a/xta-adapter/src/test/resources/application-itcase.yml b/xta-adapter/src/test/resources/application-itcase.yml
index 99b88fbe12ffdb4562dc264c08595afde1b9092a..e4f04915dcad084966187e831830afba2e8da1c1 100644
--- a/xta-adapter/src/test/resources/application-itcase.yml
+++ b/xta-adapter/src/test/resources/application-itcase.yml
@@ -1,6 +1,7 @@
 ozgcloud:
   xta:
-    identifier: afmsh:010600000000_Online-Dienste
+    identifiers:
+      - afmsh:010600000000_Online-Dienste
     server:
       address: localhost:3000
       name: LI33-0005