diff --git a/user-manager-server/src/main/java/de/itvsh/kop/user/keycloak/KeycloakApiService.java b/user-manager-server/src/main/java/de/itvsh/kop/user/keycloak/KeycloakApiService.java
index 87e220d32c90b8fc74c3868c63c2a34ac3b47e06..3a005b22cd86714c39870f8f58824d96db0576b6 100644
--- a/user-manager-server/src/main/java/de/itvsh/kop/user/keycloak/KeycloakApiService.java
+++ b/user-manager-server/src/main/java/de/itvsh/kop/user/keycloak/KeycloakApiService.java
@@ -31,12 +31,14 @@ import java.util.stream.StreamSupport;
 
 import javax.enterprise.context.ApplicationScoped;
 import javax.inject.Inject;
+import javax.ws.rs.BadRequestException;
 import javax.ws.rs.ClientErrorException;
 import javax.ws.rs.ProcessingException;
 
 import org.apache.commons.lang3.ObjectUtils;
 import org.eclipse.microprofile.config.inject.ConfigProperty;
 import org.keycloak.admin.client.resource.RealmResource;
+import org.keycloak.admin.client.resource.UserResource;
 import org.keycloak.representations.idm.UserRepresentation;
 
 import de.itvsh.kop.common.logging.KopLogging;
@@ -96,7 +98,15 @@ class KeycloakApiService {
 		var ozgCloudUserIdInKeycloak = userRepresentation.firstAttribute(attributeName);
 		if (ObjectUtils.notEqual(ozgCloudUserIdInKeycloak, attributeValue)) {
 			userRepresentation.singleAttribute(attributeName, attributeValue);
+			tryUpdateUserResource(userResource,userRepresentation, attributeName);
+		}
+	}
+
+	private void tryUpdateUserResource(UserResource userResource, UserRepresentation userRepresentation, String attributeName) {
+		try {
 			userResource.update(userRepresentation);
+		} catch (BadRequestException e) {
+			LOG.warn("Could not update user attribute {} in Keycloak.", attributeName, e);
 		}
 	}
 }
\ No newline at end of file
diff --git a/user-manager-server/src/test/java/de/itvsh/kop/user/keycloak/KeycloakApiServiceTest.java b/user-manager-server/src/test/java/de/itvsh/kop/user/keycloak/KeycloakApiServiceTest.java
index 66f1c9f24e401e68f6f23272ed2806d25006cd3f..deb55ce6f6f4e247cd6478b70dce82cd3bba61a1 100644
--- a/user-manager-server/src/test/java/de/itvsh/kop/user/keycloak/KeycloakApiServiceTest.java
+++ b/user-manager-server/src/test/java/de/itvsh/kop/user/keycloak/KeycloakApiServiceTest.java
@@ -31,6 +31,7 @@ import static org.mockito.Mockito.*;
 import java.util.function.Supplier;
 import java.util.stream.Stream;
 
+import javax.ws.rs.BadRequestException;
 import javax.ws.rs.ClientErrorException;
 import javax.ws.rs.ProcessingException;
 
@@ -254,5 +255,14 @@ class KeycloakApiServiceTest {
 
 			verify(userRepresentation, never()).singleAttribute(ATTRIBUTE_NAME_USER_ID, ATTRIBUTE_VALUE_USER_ID);
 		}
+
+		@Test
+		void shouldCatchBadRequestException() {
+			when(userRepresentation.firstAttribute(ATTRIBUTE_NAME_USER_ID)).thenReturn(NEW_USER_ID);
+			doThrow(new BadRequestException("error message")).when(userResource).update(userRepresentation);
+
+			assertThatCode(
+					() -> service.updateAttribute(KEYCLOAK_USER_ID, ATTRIBUTE_NAME_USER_ID, ATTRIBUTE_VALUE_USER_ID)).doesNotThrowAnyException();
+		}
 	}
 }
\ No newline at end of file