diff --git a/vorgang-manager-server/pom.xml b/vorgang-manager-server/pom.xml
index e31d13e0620038b7ecf48cdf88813e8e003bb0f1..afb9fb15517ad544ac6e544307ec7b0ce8549197 100644
--- a/vorgang-manager-server/pom.xml
+++ b/vorgang-manager-server/pom.xml
@@ -55,10 +55,10 @@
 		<user-manager-interface.version>2.9.0-SNAPSHOT</user-manager-interface.version>
 		<bescheid-manager.version>1.18.0-SNAPSHOT</bescheid-manager.version>
 		<processor-manager.version>0.4.1</processor-manager.version>
-		<nachrichten-manager.version>2.12.0-SNAPSHOT</nachrichten-manager.version>
+		<nachrichten-manager.version>2.13.0-SNAPSHOT</nachrichten-manager.version>
 		<ozgcloud-starter.version>0.12.0</ozgcloud-starter.version>
 		<notification-manager.version>2.11.0-SNAPSHOT</notification-manager.version>
-		<collaboration-manager.version>0.3.0-SNAPSHOT</collaboration-manager.version>
+		<collaboration-manager.version>0.3.0</collaboration-manager.version>
 
 		<zip.version>2.11.1</zip.version>
 		<jsoup.version>1.15.3</jsoup.version>
diff --git a/vorgang-manager-server/src/test/java/de/ozgcloud/nachrichten/antragraum/AntragraumITCase.java b/vorgang-manager-server/src/test/java/de/ozgcloud/nachrichten/antragraum/AntragraumITCase.java
index 1488e8f8dd4f1baef4b2831081ccd6a078a6ef36..ec609a25a144ce825debb13c7e95573d2695159c 100644
--- a/vorgang-manager-server/src/test/java/de/ozgcloud/nachrichten/antragraum/AntragraumITCase.java
+++ b/vorgang-manager-server/src/test/java/de/ozgcloud/nachrichten/antragraum/AntragraumITCase.java
@@ -39,6 +39,7 @@ import de.ozgcloud.vorgang.servicekonto.ServiceKontoTestFactory;
 import de.ozgcloud.vorgang.vorgang.Vorgang;
 import de.ozgcloud.vorgang.vorgang.VorgangHeadTestFactory;
 import de.ozgcloud.vorgang.vorgang.VorgangTestFactory;
+import io.grpc.StatusRuntimeException;
 import io.grpc.stub.StreamObserver;
 
 @SpringBootTest(classes = { VorgangManagerServerApplication.class }, properties = {
@@ -186,6 +187,57 @@ class AntragraumITCase {
 		}
 	}
 
+	@DisplayName("Ger rueckfrage")
+	@Nested
+	class TestGetRueckfrage {
+
+		@Mock
+		private StreamObserver<GrpcGetRueckfrageResponse> responseObserver;
+
+		@Captor
+		private ArgumentCaptor<GrpcGetRueckfrageResponse> captor;
+
+		private Vorgang savedVorgang;
+		private VorgangAttachedItem vorgangAttachedItem;
+
+		@BeforeEach
+		void prepareDatabase() {
+			savedVorgang = mongoOperations.save(VorgangTestFactory.createBuilder().id(null).build(), Vorgang.COLLECTION_NAME);
+			vorgangAttachedItem = mongoOperations.save(createPostfachNachrichtVorgangAttachedItem(savedVorgang.getId()),
+					VorgangAttachedItem.COLLECTION_NAME);
+
+			when(verifier.verify(any())).thenReturn(Collections.emptyList());
+			when(decrypter.decryptTrustLevel(any())).thenReturn("STORK-QAA-Level-1");
+		}
+
+		@Test
+		void shouldReturnOnMatchingPostfachId() {
+			when(decrypter.decryptPostfachId(any())).thenReturn(PostfachAddressTestFactory.STRING_BASED_IDENTIFIER_POSTFACH_ID_VALUE);
+
+			var request = GrpcGetRueckfrageRequestTestFactory.createBuilder()
+					.setId(vorgangAttachedItem.getId())
+					.setSamlToken(TestUtils.loadTextFile("SamlResponse.xml"))
+					.build();
+			grpcService.getRueckfrage(request, responseObserver);
+
+			verify(responseObserver, timeout(30000)).onNext(captor.capture());
+			assertThat(captor.getValue().getRueckfrage()).isNotNull();
+		}
+
+		@Test
+		void shouldThrowExceptionOnMismatchingPostfachId() {
+			when(decrypter.decryptPostfachId(any())).thenReturn("not-match-postfach-id");
+
+			var request = GrpcGetRueckfrageRequestTestFactory.createBuilder()
+					.setId(vorgangAttachedItem.getId())
+					.setSamlToken(TestUtils.loadTextFile("SamlResponse.xml"))
+					.build();
+			assertThatThrownBy(() -> grpcService.getRueckfrage(request, responseObserver))
+					.isInstanceOf(StatusRuntimeException.class)
+					.hasMessageContaining("NOT_FOUND");
+		}
+	}
+
 	private Vorgang createVorgang(TrustLevel trustLevel) {
 		return VorgangTestFactory.createBuilder()
 				.id(null)