diff --git a/src/platform/plugins/shared/kql/moon.yml b/src/platform/plugins/shared/kql/moon.yml
index 0b8323cd8dd29..e7c11541bc5a7 100644
--- a/src/platform/plugins/shared/kql/moon.yml
+++ b/src/platform/plugins/shared/kql/moon.yml
@@ -33,6 +33,7 @@ dependsOn:
   - '@kbn/utility-types-jest'
   - '@kbn/config-schema'
   - '@kbn/css-utils'
+  - '@kbn/config'
 tags:
   - plugin
   - prod
diff --git a/src/platform/plugins/shared/kql/server/config_deprecations.test.ts b/src/platform/plugins/shared/kql/server/config_deprecations.test.ts
new file mode 100644
index 0000000000000..e8010d5055fd6
--- /dev/null
+++ b/src/platform/plugins/shared/kql/server/config_deprecations.test.ts
@@ -0,0 +1,138 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the "Elastic License
+ * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
+ * Public License v 1"; you may not use this file except in compliance with, at
+ * your election, the "Elastic License 2.0", the "GNU Affero General Public
+ * License v3.0 only", or the "Server Side Public License, v 1".
+ */
+
+import { cloneDeep } from 'lodash';
+
+import { applyDeprecations, configDeprecationFactory } from '@kbn/config';
+import { configDeprecationsMock } from '@kbn/core/server/mocks';
+
+import { autocompleteConfigDeprecationProvider } from './config_deprecations';
+
+const deprecationContext = configDeprecationsMock.createContext();
+
+const applyConfigDeprecations = (settings: Record<string, any> = {}) => {
+  const deprecations = autocompleteConfigDeprecationProvider(configDeprecationFactory);
+  const deprecationMessages: string[] = [];
+  const migrated = applyDeprecations(
+    settings,
+    deprecations.map((deprecation) => ({
+      deprecation,
+      path: '',
+      context: deprecationContext,
+    })),
+    () =>
+      ({ message }) =>
+        deprecationMessages.push(message)
+  );
+  return {
+    messages: deprecationMessages,
+    migrated: migrated.config,
+  };
+};
+
+describe('Config Deprecations', () => {
+  it('does not report deprecations for default configurationc', () => {
+    const configFirstStep = { data: { autocomplete: { valueSuggestions: {} } } };
+    const { messages, migrated } = applyConfigDeprecations(cloneDeep(configFirstStep));
+    expect(migrated).toEqual(configFirstStep);
+    expect(messages).toHaveLength(0);
+  });
+
+  it('renames kibana.autocompleteTerminateAfter to unifiedSearch.autocomplete.valueSuggestions.terminateAfter', () => {
+    const config = {
+      kibana: {
+        autocompleteTerminateAfter: 123,
+      },
+    };
+    const { messages, migrated } = applyConfigDeprecations(cloneDeep(config));
+    expect(migrated.kibana?.autocompleteTerminateAfter).not.toBeDefined();
+    expect(migrated.unifiedSearch.autocomplete.valueSuggestions.terminateAfter).toEqual(123);
+    expect(messages).toMatchInlineSnapshot(`
+      Array [
+        "Setting \\"kibana.autocompleteTerminateAfter\\" has been replaced by \\"unifiedSearch.autocomplete.valueSuggestions.terminateAfter\\"",
+      ]
+    `);
+  });
+
+  it('renames kibana.autocompleteTimeout to unifiedSearch.autocomplete.valueSuggestions.timeout', () => {
+    const config = {
+      kibana: {
+        autocompleteTimeout: 123,
+      },
+    };
+    const { messages, migrated } = applyConfigDeprecations(cloneDeep(config));
+    expect(migrated.kibana?.autocompleteTimeout).not.toBeDefined();
+    expect(migrated.unifiedSearch.autocomplete.valueSuggestions.timeout).toEqual(123);
+    expect(messages).toMatchInlineSnapshot(`
+      Array [
+        "Setting \\"kibana.autocompleteTimeout\\" has been replaced by \\"unifiedSearch.autocomplete.valueSuggestions.timeout\\"",
+      ]
+    `);
+  });
+
+  it('renames data.autocomplete.querySuggestions.enabled to unifiedSearch.autocomplete.querySuggestions.enabled', () => {
+    const config = {
+      data: {
+        autocomplete: {
+          querySuggestions: {
+            enabled: false,
+          },
+        },
+      },
+    };
+    const { messages, migrated } = applyConfigDeprecations(cloneDeep(config));
+    expect(migrated.data?.autocomplete.querySuggestions.enabled).not.toBeDefined();
+    expect(migrated.unifiedSearch.autocomplete.querySuggestions.enabled).toEqual(false);
+    expect(messages).toMatchInlineSnapshot(`
+      Array [
+        "Setting \\"data.autocomplete.querySuggestions.enabled\\" has been replaced by \\"unifiedSearch.autocomplete.querySuggestions.enabled\\"",
+      ]
+    `);
+  });
+
+  it('renames data.autocomplete.valueSuggestions.enabled to unifiedSearch.autocomplete.valueSuggestions.enabled', () => {
+    const config = {
+      data: {
+        autocomplete: {
+          valueSuggestions: {
+            enabled: false,
+          },
+        },
+      },
+    };
+    const { messages, migrated } = applyConfigDeprecations(cloneDeep(config));
+    expect(migrated.data?.autocomplete.valueSuggestions.enabled).not.toBeDefined();
+    expect(migrated.unifiedSearch.autocomplete.valueSuggestions.enabled).toEqual(false);
+    expect(messages).toMatchInlineSnapshot(`
+      Array [
+        "Setting \\"data.autocomplete.valueSuggestions.enabled\\" has been replaced by \\"unifiedSearch.autocomplete.valueSuggestions.enabled\\"",
+      ]
+    `);
+  });
+
+  it('renames data.autocomplete.valueSuggestions.tiers to unifiedSearch.autocomplete.valueSuggestions.tiers', () => {
+    const config = {
+      data: {
+        autocomplete: {
+          valueSuggestions: {
+            tiers: [],
+          },
+        },
+      },
+    };
+    const { messages, migrated } = applyConfigDeprecations(cloneDeep(config));
+    expect(migrated.data?.autocomplete.valueSuggestions.tiers).not.toBeDefined();
+    expect(migrated.unifiedSearch.autocomplete.valueSuggestions.tiers).toEqual([]);
+    expect(messages).toMatchInlineSnapshot(`
+      Array [
+        "Setting \\"data.autocomplete.valueSuggestions.tiers\\" has been replaced by \\"unifiedSearch.autocomplete.valueSuggestions.tiers\\"",
+      ]
+    `);
+  });
+});
diff --git a/src/platform/plugins/shared/kql/server/config_deprecations.ts b/src/platform/plugins/shared/kql/server/config_deprecations.ts
new file mode 100644
index 0000000000000..d5cab66712076
--- /dev/null
+++ b/src/platform/plugins/shared/kql/server/config_deprecations.ts
@@ -0,0 +1,60 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the "Elastic License
+ * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
+ * Public License v 1"; you may not use this file except in compliance with, at
+ * your election, the "Elastic License 2.0", the "GNU Affero General Public
+ * License v3.0 only", or the "Server Side Public License, v 1".
+ */
+
+import type { ConfigDeprecationProvider } from '@kbn/core/server';
+
+export const autocompleteConfigDeprecationProvider: ConfigDeprecationProvider = ({
+  renameFromRoot,
+}) => [
+  renameFromRoot(
+    'data.autocomplete.valueSuggestions.terminateAfter',
+    'unifiedSearch.autocomplete.valueSuggestions.terminateAfter',
+    { level: 'warning' }
+  ),
+  renameFromRoot(
+    'kibana.autocompleteTerminateAfter',
+    'unifiedSearch.autocomplete.valueSuggestions.terminateAfter',
+    { level: 'warning' }
+  ),
+  renameFromRoot(
+    'data.autocomplete.valueSuggestions.timeout',
+    'unifiedSearch.autocomplete.valueSuggestions.timeout',
+    {
+      level: 'warning',
+    }
+  ),
+  renameFromRoot(
+    'kibana.autocompleteTimeout',
+    'unifiedSearch.autocomplete.valueSuggestions.timeout',
+    {
+      level: 'warning',
+    }
+  ),
+  renameFromRoot(
+    'data.autocomplete.querySuggestions.enabled',
+    'unifiedSearch.autocomplete.querySuggestions.enabled',
+    {
+      level: 'warning',
+    }
+  ),
+  renameFromRoot(
+    'data.autocomplete.valueSuggestions.enabled',
+    'unifiedSearch.autocomplete.valueSuggestions.enabled',
+    {
+      level: 'warning',
+    }
+  ),
+  renameFromRoot(
+    'data.autocomplete.valueSuggestions.tiers',
+    'unifiedSearch.autocomplete.valueSuggestions.tiers',
+    {
+      level: 'warning',
+    }
+  ),
+];
diff --git a/src/platform/plugins/shared/kql/server/index.ts b/src/platform/plugins/shared/kql/server/index.ts
index 9f42b31e4205c..563fff8826aaf 100644
--- a/src/platform/plugins/shared/kql/server/index.ts
+++ b/src/platform/plugins/shared/kql/server/index.ts
@@ -11,6 +11,7 @@ import type { PluginConfigDescriptor, PluginInitializerContext } from '@kbn/core
 import type { ConfigSchema } from './config';
 import { configSchema } from './config';
 import type { KQLServerPlugin, KQLServerPluginSetup, KQLServerPluginStart } from './plugin';
+import { autocompleteConfigDeprecationProvider } from './config_deprecations';
 
 /**
  * Static code to be shared externally
@@ -30,4 +31,5 @@ export const config: PluginConfigDescriptor<ConfigSchema> = {
     autocomplete: true,
   },
   schema: configSchema,
+  deprecations: autocompleteConfigDeprecationProvider,
 };
diff --git a/src/platform/plugins/shared/kql/tsconfig.json b/src/platform/plugins/shared/kql/tsconfig.json
index 89627ea7ccb59..a5802a326d7da 100644
--- a/src/platform/plugins/shared/kql/tsconfig.json
+++ b/src/platform/plugins/shared/kql/tsconfig.json
@@ -26,6 +26,7 @@
     "@kbn/utility-types-jest",
     "@kbn/config-schema",
     "@kbn/css-utils",
+    "@kbn/config",
   ],
   "exclude": [
     "target/**/*",