diff --git a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/step/rollover/AttemptRolloverStep.kt b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/step/rollover/AttemptRolloverStep.kt
index bd7ce82f0..6769ac4f7 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/step/rollover/AttemptRolloverStep.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/step/rollover/AttemptRolloverStep.kt
@@ -330,7 +330,7 @@ class AttemptRolloverStep(private val action: RolloverAction) : Step(name) {
             } else {
                 stepStatus = StepStatus.FAILED
                 info = listOfNotNull(
-                    "message" to getFailedCopyAliasMessage(indexName, rolledOverIndexName),
+                    "message" to getCopyAliasNotAckMessage(indexName, rolledOverIndexName),
                     if (conditions != null) "conditions" to conditions else null
                 ).toMap()
             }
@@ -389,6 +389,8 @@ class AttemptRolloverStep(private val action: RolloverAction) : Step(name) {
             "Successfully rolled over and copied alias from [index=$index] to [index=$newIndex]"
         fun getFailedCopyAliasMessage(index: String, newIndex: String) =
             "Successfully rolled over but failed to copied alias from [index=$index] to [index=$newIndex]"
+        fun getCopyAliasNotAckMessage(index: String, newIndex: String) =
+            "Successfully rolled over but copy alias from [index=$index] to [index=$newIndex] is not acknowledged"
         fun getCopyAliasIndexNotFoundMessage(newIndex: String?) =
             "Successfully rolled over but new index [index=$newIndex] not found during copy alias"
         fun getCopyAliasRolledOverIndexNotFoundMessage(index: String?) =
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/step/AttemptRolloverStepTests.kt b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/step/AttemptRolloverStepTests.kt
index 76c45d637..845d7d429 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/step/AttemptRolloverStepTests.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/step/AttemptRolloverStepTests.kt
@@ -65,6 +65,30 @@ class AttemptRolloverStepTests : OpenSearchTestCase() {
         whenever(metadata.index(oldIndexName).rolloverInfos).thenReturn(mapOf(alias to mock()))
     }
 
+    fun `test copy alias in rollover step is not acknowledged`() {
+        val rolloverResponse = RolloverResponse(oldIndexName, newIndexName, mapOf(), false, true, true, true)
+        val aliasResponse = AcknowledgedResponse(false)
+        // val exception = Exception("test exception")
+        val client = getClient(getAdminClient(getIndicesAdminClient(rolloverResponse, aliasResponse, null, null)))
+
+        runBlocking {
+            val rolloverAction = RolloverAction(null, null, null, null, true, 0)
+            val managedIndexMetaData = ManagedIndexMetaData(
+                oldIndexName, "indexUuid", "policy_id",
+                null, null, null,
+                null, null, null,
+                null, null, null,
+                null, null, rolledOverIndexName = newIndexName
+            )
+            val attemptRolloverStep = AttemptRolloverStep(rolloverAction)
+            val context = StepContext(managedIndexMetaData, clusterService, client, null, null, scriptService, settings, lockService)
+            attemptRolloverStep.preExecute(logger, context).execute()
+            val updatedManagedIndexMetaData = attemptRolloverStep.getUpdatedManagedIndexMetadata(managedIndexMetaData)
+            assertEquals("Step status is not FAILED", Step.StepStatus.FAILED, updatedManagedIndexMetaData.stepMetaData?.stepStatus)
+            assertEquals("message info is not matched", AttemptRolloverStep.getCopyAliasNotAckMessage(oldIndexName, newIndexName), updatedManagedIndexMetaData.info?.get("message"))
+        }
+    }
+
     fun `test copy alias in rollover step failed`() {
         val rolloverResponse = RolloverResponse(oldIndexName, newIndexName, mapOf(), false, true, true, true)
         // val aliasResponse = AcknowledgedResponse(true)