diff --git a/x-pack/plugins/alerting/server/alerts_service/resource_installer_utils.test.ts b/x-pack/plugins/alerting/server/alerts_service/resource_installer_utils.test.ts
index f059b77a5c88..1672f1c32941 100644
--- a/x-pack/plugins/alerting/server/alerts_service/resource_installer_utils.test.ts
+++ b/x-pack/plugins/alerting/server/alerts_service/resource_installer_utils.test.ts
@@ -38,7 +38,13 @@ describe('getIndexTemplateAndPattern', () => {
       pattern: '.internal.alerts-test.alerts-default-*',
       basePattern: '.alerts-test.alerts-*',
       alias: '.alerts-test.alerts-default',
-      validPrefixes: ['.ds-.alerts-', '.internal.alerts-', '.alerts-'],
+      validPrefixes: [
+        '.ds-.alerts-',
+        '.internal.alerts-',
+        '.alerts-',
+        '.internal.preview.alerts-',
+        '.preview.alerts-',
+      ],
       name: '.internal.alerts-test.alerts-default-000001',
     });
   });
@@ -49,7 +55,13 @@ describe('getIndexTemplateAndPattern', () => {
       pattern: '.internal.alerts-test.alerts-special-*',
       basePattern: '.alerts-test.alerts-*',
       alias: '.alerts-test.alerts-special',
-      validPrefixes: ['.ds-.alerts-', '.internal.alerts-', '.alerts-'],
+      validPrefixes: [
+        '.ds-.alerts-',
+        '.internal.alerts-',
+        '.alerts-',
+        '.internal.preview.alerts-',
+        '.preview.alerts-',
+      ],
       name: '.internal.alerts-test.alerts-special-000001',
     });
   });
@@ -67,7 +79,13 @@ describe('getIndexTemplateAndPattern', () => {
       basePattern: '.alerts-test.alerts-*',
       alias: '.alerts-test.alerts-special',
       name: '.internal.alerts-test.alerts-special-000001',
-      validPrefixes: ['.ds-.alerts-', '.internal.alerts-', '.alerts-'],
+      validPrefixes: [
+        '.ds-.alerts-',
+        '.internal.alerts-',
+        '.alerts-',
+        '.internal.preview.alerts-',
+        '.preview.alerts-',
+      ],
       secondaryAlias: `siem.signals-special`,
     });
   });
diff --git a/x-pack/plugins/alerting/server/alerts_service/resource_installer_utils.ts b/x-pack/plugins/alerting/server/alerts_service/resource_installer_utils.ts
index 7a1031cdf222..d1c2c2c6e734 100644
--- a/x-pack/plugins/alerting/server/alerts_service/resource_installer_utils.ts
+++ b/x-pack/plugins/alerting/server/alerts_service/resource_installer_utils.ts
@@ -13,7 +13,13 @@ interface GetComponentTemplateNameOpts {
   context?: string;
   name?: string;
 }
-export const VALID_ALERT_INDEX_PREFIXES = ['.ds-.alerts-', '.internal.alerts-', '.alerts-'];
+export const VALID_ALERT_INDEX_PREFIXES = [
+  '.ds-.alerts-',
+  '.internal.alerts-',
+  '.alerts-',
+  '.internal.preview.alerts-',
+  '.preview.alerts-',
+];
 
 export const getComponentTemplateName = ({ context, name }: GetComponentTemplateNameOpts = {}) =>
   `.alerts-${context ? `${context}.alerts` : name ? name : 'framework'}-mappings`;