diff --git a/plugins/repository-hdfs/build.gradle b/plugins/repository-hdfs/build.gradle
index 0fcf5173bc4..528713bfa49 100644
--- a/plugins/repository-hdfs/build.gradle
+++ b/plugins/repository-hdfs/build.gradle
@@ -114,7 +114,7 @@ testClusters.integTest {
   plugin(project.tasks.bundlePlugin.archiveFile)
 }
 
-String realm = "BUILD.ELASTIC.CO"
+String realm = "BUILD.OPENSEARCH.ORG"
 String krb5conf = project(':test:fixtures:krb5kdc-fixture').ext.krb5Conf("hdfs")
 
 // Create HDFS File System Testing Fixtures for HA/Secure combinations
diff --git a/test/fixtures/krb5kdc-fixture/src/main/resources/env.properties b/test/fixtures/krb5kdc-fixture/src/main/resources/env.properties
index a9b3d026902..216e1095da4 100644
--- a/test/fixtures/krb5kdc-fixture/src/main/resources/env.properties
+++ b/test/fixtures/krb5kdc-fixture/src/main/resources/env.properties
@@ -26,6 +26,12 @@
 # specific language governing permissions and limitations
 # under the License.
 
+#
+# Modifications Copyright OpenSearch Contributors. See
+# GitHub history for details.
+#
+
+
 realm=BUILD.OPENSEARCH.ORG
 kdc=kerberos.build.opensearch.org
 zone=build.opensearch.org
diff --git a/test/fixtures/krb5kdc-fixture/src/main/resources/provision/hdfs.sh b/test/fixtures/krb5kdc-fixture/src/main/resources/provision/hdfs.sh
index ea14cfb751d..269b4246a9e 100644
--- a/test/fixtures/krb5kdc-fixture/src/main/resources/provision/hdfs.sh
+++ b/test/fixtures/krb5kdc-fixture/src/main/resources/provision/hdfs.sh
@@ -1,10 +1,20 @@
 #!/bin/bash
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# The OpenSearch Contributors require contributions made to
+# this file be licensed under the Apache-2.0 license or a
+# compatible open source license.
+#
+# Modifications Copyright OpenSearch Contributors. See
+# GitHub history for details.
+#
 
 set -e
 
 addprinc.sh "opensearch"
 #TODO(OpenSearch): fix username
-addprinc.sh "hdfs/hdfs.build.opensearch.co"
+addprinc.sh "hdfs/hdfs.build.opensearch.org"
 
 # Use this as a signal that setup is complete
 python3 -m http.server 4444 &
diff --git a/test/fixtures/krb5kdc-fixture/src/main/resources/provision/installkdc.sh b/test/fixtures/krb5kdc-fixture/src/main/resources/provision/installkdc.sh
index 5c8e4abbc63..081625d1ea1 100755
--- a/test/fixtures/krb5kdc-fixture/src/main/resources/provision/installkdc.sh
+++ b/test/fixtures/krb5kdc-fixture/src/main/resources/provision/installkdc.sh
@@ -1,4 +1,11 @@
 #!/bin/bash
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# The OpenSearch Contributors require contributions made to
+# this file be licensed under the Apache-2.0 license or a
+# compatible open source license.
+#
 
 # Licensed to Elasticsearch under one or more contributor
 # license agreements. See the NOTICE file distributed with
@@ -17,6 +24,11 @@
 # specific language governing permissions and limitations
 # under the License.
 
+#
+# Modifications Copyright OpenSearch Contributors. See
+# GitHub history for details.
+#
+
 set -e
 
 # KDC installation steps and considerations based on https://web.mit.edu/kerberos/krb5-latest/doc/admin/install_kdc.html
@@ -35,14 +47,14 @@ MARKER_FILE=/etc/marker
 REALM_NAME=$(cat $ENVPROP_FILE | grep realm= | cut -d '=' -f 2)
 KDC_NAME=$(cat $ENVPROP_FILE | grep kdc= | cut -d '=' -f 2)
 BUILD_ZONE=$(cat $ENVPROP_FILE | grep zone= | cut -d '=' -f 2)
-ELASTIC_ZONE=$(echo $BUILD_ZONE | cut -d '.' -f 1,2)
+OPENSEARCH_ZONE=$(echo $BUILD_ZONE | cut -d '.' -f 1,2)
 
 # Transfer and interpolate krb5.conf
 cp $PROV_DIR/krb5.conf.template $LOCALSTATEDIR/krb5.conf
 sed -i 's/${REALM_NAME}/'$REALM_NAME'/g' $LOCALSTATEDIR/krb5.conf
 sed -i 's/${KDC_NAME}/'$KDC_NAME'/g' $LOCALSTATEDIR/krb5.conf
 sed -i 's/${BUILD_ZONE}/'$BUILD_ZONE'/g' $LOCALSTATEDIR/krb5.conf
-sed -i 's/${ELASTIC_ZONE}/'$ELASTIC_ZONE'/g' $LOCALSTATEDIR/krb5.conf
+sed -i 's/${OPENSEARCH_ZONE}/'$OPENSEARCH_ZONE'/g' $LOCALSTATEDIR/krb5.conf
 
 
 # Transfer and interpolate the kdc.conf
@@ -51,7 +63,7 @@ cp $PROV_DIR/kdc.conf.template $LOCALSTATEDIR/krb5kdc/kdc.conf
 sed -i 's/${REALM_NAME}/'$REALM_NAME'/g' $LOCALSTATEDIR/krb5kdc/kdc.conf
 sed -i 's/${KDC_NAME}/'$KDC_NAME'/g' $LOCALSTATEDIR/krb5kdc/kdc.conf
 sed -i 's/${BUILD_ZONE}/'$BUILD_ZONE'/g' $LOCALSTATEDIR/krb5kdc/kdc.conf
-sed -i 's/${ELASTIC_ZONE}/'$ELASTIC_ZONE'/g' $LOCALSTATEDIR/krb5.conf
+sed -i 's/${OPENSEARCH_ZONE}/'$OPENSEARCH_ZONE'/g' $LOCALSTATEDIR/krb5.conf
 
 # Touch logging locations
 mkdir -p $LOGDIR
diff --git a/test/fixtures/krb5kdc-fixture/src/main/resources/provision/krb5.conf.template b/test/fixtures/krb5kdc-fixture/src/main/resources/provision/krb5.conf.template
index e09c8fc1ab7..57fd8ac8497 100644
--- a/test/fixtures/krb5kdc-fixture/src/main/resources/provision/krb5.conf.template
+++ b/test/fixtures/krb5kdc-fixture/src/main/resources/provision/krb5.conf.template
@@ -1,3 +1,11 @@
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# The OpenSearch Contributors require contributions made to
+# this file be licensed under the Apache-2.0 license or a
+# compatible open source license.
+#
+
 # Licensed to Elasticsearch under one or more contributor
 # license agreements. See the NOTICE file distributed with
 # this work for additional information regarding copyright
@@ -15,6 +23,11 @@
 # specific language governing permissions and limitations
 # under the License.
 
+#
+# Modifications Copyright OpenSearch Contributors. See
+# GitHub history for details.
+#
+
 [libdefaults]
     default_realm = ${REALM_NAME}
     dns_canonicalize_hostname = false
@@ -42,6 +55,6 @@
 [domain_realm]
     ${BUILD_ZONE} = ${REALM_NAME}
     .${BUILD_ZONE} = ${REALM_NAME}
-    ${ELASTIC_ZONE} = ${REALM_NAME}
-    .${ELASTIC_ZONE} = ${REALM_NAME}
+    ${OPENSEARCH_ZONE} = ${REALM_NAME}
+    .${OPENSEARCH_ZONE} = ${REALM_NAME}