diff --git a/corehq/apps/es/client.py b/corehq/apps/es/client.py
index 1a8a2267fe08..f0618a08c456 100644
--- a/corehq/apps/es/client.py
+++ b/corehq/apps/es/client.py
@@ -399,7 +399,8 @@ def _validate_single_index(index):
 
     def reindex(
             self, source, dest, wait_for_completion=False,
-            refresh=False, batch_size=1000, requests_per_second=None, copy_doc_ids=True, query=None,
+            refresh=False, batch_size=1000, requests_per_second=None,
+            copy_doc_ids=True, query=None, purge_ids=False
     ):
         """
         Starts the reindex process in elastic search cluster
@@ -416,6 +417,7 @@ def reindex(
                            and can be reduced if you encounter scroll timeouts.
         :param query: ``dict`` optional parameter to include a term query to filter which documents are included in
                       the reindex
+        :param purge_ids: ``bool`` if True, will remove the _id field from the documents
         :returns: None if wait_for_completion is True else would return task_id of reindex task
         """
 
@@ -435,27 +437,35 @@ def reindex(
             "conflicts": "proceed"
         }
 
-    # Should be removed after ES 5-6 migration
-        if copy_doc_ids and source == const.HQ_USERS_INDEX_NAME:
-            # Remove password from form index
+        if copy_doc_ids or purge_ids:
             reindex_body["script"] = {
                 "lang": "painless",
-                "source": """
-                ctx._source.remove('password');
-                if (!ctx._source.containsKey('doc_id')) {
-                    ctx._source['doc_id'] = ctx._id;
-                }
-                """
-            }
-        elif copy_doc_ids:
-            reindex_body["script"] = {
-                "lang": "painless",
-                "source": """
-                if (!ctx._source.containsKey('doc_id')) {
-                    ctx._source['doc_id'] = ctx._id;
-                }
-                """
+                "source": ""
             }
+            script_parts = []
+
+            if purge_ids:
+                script_parts.append("""
+                    if (ctx._source.containsKey('_id')) {
+                        ctx._source.remove('_id');
+                    }
+                """)
+
+            if source == const.HQ_USERS_INDEX_NAME:
+                # Remove password field from users index
+                script_parts.append("""
+                    ctx._source.remove('password');
+                """)
+
+            if copy_doc_ids:
+                # Add doc_id field to the documents
+                script_parts.append("""
+                    if (!ctx._source.containsKey('doc_id')) {
+                        ctx._source['doc_id'] = ctx._id;
+                    }
+                """)
+
+            reindex_body["script"]["source"] = " ".join(script_parts)
 
         reindex_kwargs = {
             "wait_for_completion": wait_for_completion,
@@ -1118,6 +1128,10 @@ def __init__(self, primary_adapter, secondary_adapter):
     def mapping(self):
         return self.primary.mapping
 
+    @property
+    def parent_index_cname(self):
+        return self.primary.parent_index_cname
+
     def export_adapter(self):
         adapter = copy.copy(self)
         adapter.primary = adapter.primary.export_adapter()
diff --git a/corehq/apps/es/management/commands/elastic_sync_multiplexed.py b/corehq/apps/es/management/commands/elastic_sync_multiplexed.py
index 99f7781f4e18..2367fb03b5e6 100644
--- a/corehq/apps/es/management/commands/elastic_sync_multiplexed.py
+++ b/corehq/apps/es/management/commands/elastic_sync_multiplexed.py
@@ -42,7 +42,7 @@ class ESSyncUtil:
     def __init__(self):
         self.es = get_client()
 
-    def start_reindex(self, cname, reindex_batch_size=1000, requests_per_second=None):
+    def start_reindex(self, cname, reindex_batch_size=1000, requests_per_second=None, purge_ids=False):
 
         adapter = doc_adapter_from_cname(cname)
 
@@ -57,7 +57,8 @@ def start_reindex(self, cname, reindex_batch_size=1000, requests_per_second=None
 
         logger.info("Starting ReIndex process")
         task_id = es_manager.reindex(
-            source_index, destination_index, requests_per_second=requests_per_second
+            source_index, destination_index,
+            requests_per_second=requests_per_second, batch_size=reindex_batch_size, purge_ids=purge_ids
         )
         logger.info(f"Copying docs from index {source_index} to index {destination_index}")
         task_number = task_id.split(':')[1]
@@ -303,7 +304,7 @@ def _copy_checkpoints(self, pillow, new_checkpoint_id):
 
     def estimate_disk_space_for_reindex(self, stdout=None):
         indices_info = es_manager.indices_info()
-        index_cname_map = self._get_index_name_cname_map()
+        index_cname_map = self._get_index_name_cname_map(ignore_subindices=True)
         index_size_rows = []
         total_size = 0
         for index_name in index_cname_map.keys():
@@ -320,8 +321,13 @@ def estimate_disk_space_for_reindex(self, stdout=None):
         print("\n\n")
         print(f"Minimum free disk space recommended before starting the reindex: {recommended_disk}")
 
-    def _get_index_name_cname_map(self):
-        return {adapter.index_name: cname for cname, adapter in CANONICAL_NAME_ADAPTER_MAP.items()}
+    def _get_index_name_cname_map(self, ignore_subindices=False):
+        index_name_cname_map = {}
+        for cname, adapter in CANONICAL_NAME_ADAPTER_MAP.items():
+            if ignore_subindices and adapter.parent_index_cname:
+                continue
+            index_name_cname_map[adapter.index_name] = cname
+        return index_name_cname_map
 
     def _format_bytes(self, size):
         units = ['B', 'KB', 'MB', 'GB', 'TB']
@@ -463,7 +469,7 @@ class Command(BaseCommand):
 
     For getting current count of both the indices
         ```bash
-        /manage.py elastic_sync_multiplexed display_doc_counts <index_cname>
+        ./manage.py elastic_sync_multiplexed display_doc_counts <index_cname>
         ```
 
     For getting current shard allocation status for the cluster
@@ -602,7 +608,12 @@ def handle(self, **options):
         sub_cmd = options['sub_command']
         cmd_func = options.get('func')
         if sub_cmd == 'start':
-            cmd_func(options['index_cname'], options['batch_size'], options['requests_per_second'])
+            cmd_func(
+                options['index_cname'],
+                options['batch_size'],
+                options['requests_per_second'],
+                options['purge_ids']
+            )
         elif sub_cmd == 'delete':
             cmd_func(options['index_cname'])
         elif sub_cmd == 'cleanup' or sub_cmd == 'display_doc_counts':
diff --git a/corehq/apps/hqadmin/views/data.py b/corehq/apps/hqadmin/views/data.py
index 7d0ac1a1ae29..73bb34cd46a6 100644
--- a/corehq/apps/hqadmin/views/data.py
+++ b/corehq/apps/hqadmin/views/data.py
@@ -1,12 +1,13 @@
 import json
 
+from django.conf import settings
 from django.http import Http404, HttpResponse, JsonResponse
 from django.shortcuts import render
 from django.utils.translation import gettext as _
 
 from corehq.apps.domain.decorators import require_superuser
 from corehq.apps.es.es_query import ESQuery
-from corehq.apps.es.transient_util import iter_index_cnames
+from corehq.apps.es.transient_util import doc_adapter_from_cname, iter_index_cnames
 from corehq.apps.hqwebapp.doc_lookup import (
     get_databases,
     get_db_from_db_name,
@@ -31,6 +32,12 @@ def to_json(doc):
     found_indices = {}
     es_doc_type = None
     for index in iter_index_cnames():
+        if not settings.IS_SAAS_ENVIRONMENT:
+            # If we're not in a SaaS environment, we don't need to check the sub-indices
+            # because they were not created in non-saas environments.
+            doc_adapter = doc_adapter_from_cname(index)
+            if doc_adapter.parent_index_cname:
+                continue
         es_doc = lookup_doc_in_es(doc_id, index)
         if es_doc:
             found_indices[index] = to_json(es_doc)