diff --git a/x-pack/plugins/security_solution/server/lib/detection_engine/migrations/get_non_migrated_signals_info.ts b/x-pack/plugins/security_solution/server/lib/detection_engine/migrations/get_non_migrated_signals_info.ts
index dd1c1d6bf67de..d1f561fb3846c 100644
--- a/x-pack/plugins/security_solution/server/lib/detection_engine/migrations/get_non_migrated_signals_info.ts
+++ b/x-pack/plugins/security_solution/server/lib/detection_engine/migrations/get_non_migrated_signals_info.ts
@@ -101,14 +101,6 @@ export const getNonMigratedSignalsInfo = async ({
       []
     );
 
-    if (outdatedIndices.length === 0) {
-      return {
-        isMigrationRequired: false,
-        spaces: [],
-        indices: [],
-      };
-    }
-
     const outdatedIndexNames = outdatedIndices.map((outdatedIndex) => outdatedIndex.indexName);
 
     // remove duplicated spaces
diff --git a/x-pack/plugins/security_solution/server/plugin.ts b/x-pack/plugins/security_solution/server/plugin.ts
index 4b66d73c93b1f..183385fa35f99 100644
--- a/x-pack/plugins/security_solution/server/plugin.ts
+++ b/x-pack/plugins/security_solution/server/plugin.ts
@@ -281,6 +281,7 @@ export class Plugin implements ISecuritySolutionPlugin {
         all: allRiskScoreIndexPattern,
         latest: latestRiskScoreIndexPattern,
       },
+      legacySignalsIndex: config.signalsIndex,
     });
 
     this.telemetryUsageCounter = plugins.usageCollection?.createUsageCounter(APP_ID);
diff --git a/x-pack/plugins/security_solution/server/usage/collector.ts b/x-pack/plugins/security_solution/server/usage/collector.ts
index 28896e5844ac1..aa507cd683db5 100644
--- a/x-pack/plugins/security_solution/server/usage/collector.ts
+++ b/x-pack/plugins/security_solution/server/usage/collector.ts
@@ -3078,16 +3078,17 @@ export const registerCollector: RegisterCollector = ({
           },
         },
         legacy_siem_signals: {
-          indices_total: {
+          non_migrated_indices_total: {
             type: 'long',
             _meta: {
-              description: 'Total number of legacy siem signals indices',
+              description: 'Total number of non migrated legacy siem signals indices',
             },
           },
           spaces_total: {
             type: 'long',
             _meta: {
-              description: 'Total number of Kibana spaces that have legacy siem signals indices',
+              description:
+                'Total number of Kibana spaces that have non migrated legacy siem signals indices',
             },
           },
         },
diff --git a/x-pack/plugins/security_solution/server/usage/detections/legacy_siem_signals/get_initial_usage.ts b/x-pack/plugins/security_solution/server/usage/detections/legacy_siem_signals/get_initial_usage.ts
index b336d77148c5a..df222f9750490 100644
--- a/x-pack/plugins/security_solution/server/usage/detections/legacy_siem_signals/get_initial_usage.ts
+++ b/x-pack/plugins/security_solution/server/usage/detections/legacy_siem_signals/get_initial_usage.ts
@@ -8,6 +8,6 @@
 import type { LegacySiemSignals } from './types';
 
 export const getInitialLegacySiemSignalsUsage = (): LegacySiemSignals => ({
-  indices_total: 0,
+  non_migrated_indices_total: 0,
   spaces_total: 0,
 });
diff --git a/x-pack/plugins/security_solution/server/usage/detections/legacy_siem_signals/get_legacy_siem_signals_metrics.ts b/x-pack/plugins/security_solution/server/usage/detections/legacy_siem_signals/get_legacy_siem_signals_metrics.ts
index ff8424ad06738..a6d2b8bf06aff 100644
--- a/x-pack/plugins/security_solution/server/usage/detections/legacy_siem_signals/get_legacy_siem_signals_metrics.ts
+++ b/x-pack/plugins/security_solution/server/usage/detections/legacy_siem_signals/get_legacy_siem_signals_metrics.ts
@@ -27,7 +27,7 @@ export const getLegacySiemSignalsUsage = async ({
   });
 
   return {
-    indices_total: indices.length,
+    non_migrated_indices_total: indices.length,
     spaces_total: spaces.length,
   };
 };
diff --git a/x-pack/plugins/security_solution/server/usage/detections/legacy_siem_signals/types.ts b/x-pack/plugins/security_solution/server/usage/detections/legacy_siem_signals/types.ts
index 0cbde9b8352b0..b4351b2e7808f 100644
--- a/x-pack/plugins/security_solution/server/usage/detections/legacy_siem_signals/types.ts
+++ b/x-pack/plugins/security_solution/server/usage/detections/legacy_siem_signals/types.ts
@@ -5,6 +5,6 @@
  * 2.0.
  */
 export interface LegacySiemSignals {
-  indices_total: number;
+  non_migrated_indices_total: number;
   spaces_total: number;
 }
diff --git a/x-pack/plugins/telemetry_collection_xpack/schema/xpack_plugins.json b/x-pack/plugins/telemetry_collection_xpack/schema/xpack_plugins.json
index e163f107bd36e..37200bd08b7de 100644
--- a/x-pack/plugins/telemetry_collection_xpack/schema/xpack_plugins.json
+++ b/x-pack/plugins/telemetry_collection_xpack/schema/xpack_plugins.json
@@ -19539,16 +19539,16 @@
             },
             "legacy_siem_signals": {
               "properties": {
-                "indices_total": {
+                "non_migrated_indices_total": {
                   "type": "long",
                   "_meta": {
-                    "description": "Total number of legacy siem signals indices"
+                    "description": "Total number of non migrated legacy siem signals indices"
                   }
                 },
                 "spaces_total": {
                   "type": "long",
                   "_meta": {
-                    "description": "Total number of Kibana spaces that have legacy siem signals indices"
+                    "description": "Total number of Kibana spaces that have non migrated legacy siem signals indices"
                   }
                 }
               }