diff --git a/internal/service/advancedcluster/common.go b/internal/service/advancedcluster/common.go
index ce1f19d223..579d7028d9 100644
--- a/internal/service/advancedcluster/common.go
+++ b/internal/service/advancedcluster/common.go
@@ -118,7 +118,7 @@ func GetPriorityOfFlexReplicationSpecs(replicationSpecs *[]admin.ReplicationSpec
 
 func ResourceClusterListAdvancedRefreshFunc(ctx context.Context, projectID string, clustersAPI admin.ClustersApi) retry.StateRefreshFunc {
 	return func() (any, string, error) {
-		clusters, resp, err := clustersAPI.ListClusters(ctx, projectID).Execute()
+		clusters, resp, err := clustersAPI.ListClusters(ctx, projectID).UseEffectiveInstanceFields(true).Execute()
 
 		if err != nil && strings.Contains(err.Error(), "reset by peer") {
 			return nil, "REPEATING", nil
diff --git a/internal/service/advancedcluster/common_admin_sdk.go b/internal/service/advancedcluster/common_admin_sdk.go
index 593584b741..85bc716b9b 100644
--- a/internal/service/advancedcluster/common_admin_sdk.go
+++ b/internal/service/advancedcluster/common_admin_sdk.go
@@ -35,7 +35,7 @@ func CreateCluster(ctx context.Context, diags *diag.Diagnostics, client *config.
 }
 
 func createClusterLatest(ctx context.Context, diags *diag.Diagnostics, client *config.MongoDBClient, req *admin.ClusterDescription20240805, waitParams *ClusterWaitParams) *admin.ClusterDescription20240805 {
-	_, _, err := client.AtlasV2.ClustersApi.CreateCluster(ctx, waitParams.ProjectID, req).Execute()
+	_, _, err := client.AtlasV2.ClustersApi.CreateCluster(ctx, waitParams.ProjectID, req).UseEffectiveInstanceFields(true).Execute()
 	if err != nil {
 		addErrorDiag(diags, operationCreate, defaultAPIErrorDetails(waitParams.ClusterName, err))
 		return nil
@@ -44,7 +44,7 @@ func createClusterLatest(ctx context.Context, diags *diag.Diagnostics, client *c
 }
 
 func updateCluster(ctx context.Context, diags *diag.Diagnostics, client *config.MongoDBClient, req *admin.ClusterDescription20240805, waitParams *ClusterWaitParams, operationName string) *admin.ClusterDescription20240805 {
-	_, _, err := client.AtlasV2.ClustersApi.UpdateCluster(ctx, waitParams.ProjectID, waitParams.ClusterName, req).Execute()
+	_, _, err := client.AtlasV2.ClustersApi.UpdateCluster(ctx, waitParams.ProjectID, waitParams.ClusterName, req).UseEffectiveInstanceFields(true).Execute()
 	if err != nil {
 		addErrorDiag(diags, operationName, defaultAPIErrorDetails(waitParams.ClusterName, err))
 		return nil
@@ -162,7 +162,7 @@ func DeleteClusterNoWait(client *config.MongoDBClient, projectID, clusterName st
 
 func GetClusterDetails(ctx context.Context, diags *diag.Diagnostics, projectID, clusterName string, client *config.MongoDBClient, fcvPresentInState bool) (clusterDesc *admin.ClusterDescription20240805, flexClusterResp *admin.FlexClusterDescription20241113) {
 	isFlex := false
-	clusterDesc, resp, err := client.AtlasV2.ClustersApi.GetCluster(ctx, projectID, clusterName).Execute()
+	clusterDesc, resp, err := client.AtlasV2.ClustersApi.GetCluster(ctx, projectID, clusterName).UseEffectiveInstanceFields(true).Execute()
 	if err != nil {
 		if validate.StatusNotFound(resp) || admin.IsErrorCode(err, ErrorCodeClusterNotFound) {
 			return nil, nil
diff --git a/internal/service/advancedcluster/common_await_changes.go b/internal/service/advancedcluster/common_await_changes.go
index 4104244cf4..008720300a 100644
--- a/internal/service/advancedcluster/common_await_changes.go
+++ b/internal/service/advancedcluster/common_await_changes.go
@@ -97,7 +97,7 @@ func createStateChangeConfig(ctx context.Context, api admin.ClustersApi, project
 
 func ResourceRefreshFunc(ctx context.Context, name, projectID string, api admin.ClustersApi) retry.StateRefreshFunc {
 	return func() (any, string, error) {
-		cluster, resp, err := api.GetCluster(ctx, projectID, name).Execute()
+		cluster, resp, err := api.GetCluster(ctx, projectID, name).UseEffectiveInstanceFields(true).Execute()
 		if err != nil && strings.Contains(err.Error(), "reset by peer") {
 			return nil, retrystrategy.RetryStrategyRepeatingState, nil
 		}
diff --git a/internal/service/advancedcluster/plural_data_source.go b/internal/service/advancedcluster/plural_data_source.go
index a914741afe..dd14373cdb 100644
--- a/internal/service/advancedcluster/plural_data_source.go
+++ b/internal/service/advancedcluster/plural_data_source.go
@@ -54,12 +54,11 @@ func (d *pluralDS) readClusters(ctx context.Context, diags *diag.Diagnostics, pl
 	projectID := pluralModel.ProjectID.ValueString()
 	api := d.Client.AtlasV2.ClustersApi
 	params := admin.ListClustersApiParams{
-		GroupId: projectID,
+		GroupId:                    projectID,
+		UseEffectiveInstanceFields: conversion.Pointer(true),
 	}
 	list, err := dsschema.AllPages(ctx, func(ctx context.Context, pageNum int) (dsschema.PaginateResponse[admin.ClusterDescription20240805], *http.Response, error) {
-		request := api.ListClustersWithParams(ctx, &params)
-		request = request.PageNum(pageNum)
-		return request.Execute()
+		return api.ListClustersWithParams(ctx, &params).PageNum(pageNum).Execute()
 	})
 	if err != nil {
 		diags.AddError(errorList, fmt.Sprintf(errorListDetail, projectID, err.Error()))