diff --git a/x-pack/plugins/transform/public/app/sections/create_transform/components/step_define/step_define_summary.tsx b/x-pack/plugins/transform/public/app/sections/create_transform/components/step_define/step_define_summary.tsx
index af2f56fe942d..4d2cb0e71a02 100644
--- a/x-pack/plugins/transform/public/app/sections/create_transform/components/step_define/step_define_summary.tsx
+++ b/x-pack/plugins/transform/public/app/sections/create_transform/components/step_define/step_define_summary.tsx
@@ -191,8 +191,8 @@ export const StepDefineSummary: FC<Props> = ({
             }
           )}
           dataTestSubj="transformPivotPreview"
-          title={i18n.translate('xpack.transform.pivotPreview.PivotPreviewTitle', {
-            defaultMessage: 'Transform pivot preview',
+          title={i18n.translate('xpack.transform.pivotPreview.transformPreviewTitle', {
+            defaultMessage: 'Transform preview',
           })}
           toastNotifications={toastNotifications}
         />
diff --git a/x-pack/plugins/transform/public/app/sections/create_transform/components/step_details/step_details_form.tsx b/x-pack/plugins/transform/public/app/sections/create_transform/components/step_details/step_details_form.tsx
index c58d873c9834..b72d70295b10 100644
--- a/x-pack/plugins/transform/public/app/sections/create_transform/components/step_details/step_details_form.tsx
+++ b/x-pack/plugins/transform/public/app/sections/create_transform/components/step_details/step_details_form.tsx
@@ -7,6 +7,7 @@
 import React, { Fragment, FC, useEffect, useState } from 'react';
 
 import { i18n } from '@kbn/i18n';
+import { FormattedMessage } from '@kbn/i18n/react';
 
 import {
   EuiAccordion,
@@ -17,6 +18,7 @@ import {
   EuiFormRow,
   EuiSelect,
   EuiSpacer,
+  EuiCallOut,
 } from '@elastic/eui';
 
 import { KBN_FIELD_TYPES } from '../../../../../../../../../src/plugins/data/common';
@@ -50,6 +52,7 @@ import {
   transformSettingsMaxPageSearchSizeValidator,
 } from '../../../../common/validators';
 import { StepDefineExposedState } from '../step_define/common';
+import { TRANSFORM_FUNCTION } from '../../../../../../common/constants';
 
 export interface StepDetailsExposedState {
   continuousModeDateField: string;
@@ -397,6 +400,7 @@ export const StepDetailsForm: FC<Props> = React.memo(
               data-test-subj="transformDescriptionInput"
             />
           </EuiFormRow>
+
           <EuiFormRow
             label={i18n.translate('xpack.transform.stepDetailsForm.destinationIndexLabel', {
               defaultMessage: 'Destination index',
@@ -443,6 +447,30 @@ export const StepDetailsForm: FC<Props> = React.memo(
             />
           </EuiFormRow>
 
+          {stepDefineState.transformFunction === TRANSFORM_FUNCTION.LATEST ? (
+            <>
+              <EuiSpacer size={'m'} />
+              <EuiCallOut color="warning" iconType="alert" size="m">
+                <p>
+                  <FormattedMessage
+                    id="xpack.transform.stepDetailsForm.destinationIndexWarning"
+                    defaultMessage="Before you start the transform, use index templates or the {docsLink} to ensure the mappings for your destination index match the source index. Otherwise, the destination index is created with dynamic mappings. If the transform fails, check the messages tab on the Stack Management page for errors."
+                    values={{
+                      docsLink: (
+                        <EuiLink href={esIndicesCreateIndex} target="_blank">
+                          {i18n.translate('xpack.transform.stepDetailsForm.createIndexAPI', {
+                            defaultMessage: 'Create index API',
+                          })}
+                        </EuiLink>
+                      ),
+                    }}
+                  />
+                </p>
+              </EuiCallOut>
+              <EuiSpacer size={'m'} />
+            </>
+          ) : null}
+
           <EuiFormRow
             isInvalid={createIndexPattern && indexPatternTitleExists}
             error={
diff --git a/x-pack/plugins/translations/translations/ja-JP.json b/x-pack/plugins/translations/translations/ja-JP.json
index c6ba63ece55c..8d0d17962ea9 100644
--- a/x-pack/plugins/translations/translations/ja-JP.json
+++ b/x-pack/plugins/translations/translations/ja-JP.json
@@ -21111,7 +21111,6 @@
     "xpack.transform.pivotPreview.copyClipboardTooltip": "ピボットプレビューの開発コンソールステートメントをクリップボードにコピーします。",
     "xpack.transform.pivotPreview.PivotPreviewIncompleteConfigCalloutBody": "group-by フィールドと集約を 1 つ以上選んでください。",
     "xpack.transform.pivotPreview.PivotPreviewNoDataCalloutBody": "プレビューリクエストはデータを返しませんでした。オプションのクエリがデータを返し、グループ分け基準により使用されるフィールドと集約フィールドに値が存在することを確認してください。",
-    "xpack.transform.pivotPreview.PivotPreviewTitle": "ピボットプレビューを変換",
     "xpack.transform.progress": "進捗",
     "xpack.transform.statsBar.batchTransformsLabel": "一斉",
     "xpack.transform.statsBar.continuousTransformsLabel": "連続",
diff --git a/x-pack/plugins/translations/translations/zh-CN.json b/x-pack/plugins/translations/translations/zh-CN.json
index 23842498457c..426bbb8567cc 100644
--- a/x-pack/plugins/translations/translations/zh-CN.json
+++ b/x-pack/plugins/translations/translations/zh-CN.json
@@ -21160,7 +21160,6 @@
     "xpack.transform.pivotPreview.copyClipboardTooltip": "将透视预览的开发控制台语句复制到剪贴板。",
     "xpack.transform.pivotPreview.PivotPreviewIncompleteConfigCalloutBody": "请至少选择一个分组依据字段和聚合。",
     "xpack.transform.pivotPreview.PivotPreviewNoDataCalloutBody": "预览请求未返回任何数据。请确保可选查询返回数据且存在分组依据和聚合字段使用的字段的值。",
-    "xpack.transform.pivotPreview.PivotPreviewTitle": "转换数据透视表预览",
     "xpack.transform.progress": "进度",
     "xpack.transform.statsBar.batchTransformsLabel": "批量",
     "xpack.transform.statsBar.continuousTransformsLabel": "连续",