diff --git a/main.tf b/main.tf
index 79bfc0b..61376fd 100644
--- a/main.tf
+++ b/main.tf
@@ -19,7 +19,7 @@ locals {
   org_billing           = var.grant_billing_role && var.billing_account_id == "" && var.org_id != ""
   prefix                = var.prefix != "" ? "${var.prefix}-" : ""
   xpn                   = var.grant_xpn_roles && var.org_id != ""
-  service_accounts_list = [for name in var.names : google_service_account.service_accounts[name]]
+  service_accounts_list = [for account in google_service_account.service_accounts : account]
   emails_list           = [for account in local.service_accounts_list : account.email]
   iam_emails_list       = [for email in local.emails_list : "serviceAccount:${email}"]
   names                 = toset(var.names)
diff --git a/outputs.tf b/outputs.tf
index 7ae9307..35e2506 100644
--- a/outputs.tf
+++ b/outputs.tf
@@ -16,17 +16,17 @@
 
 output "service_account" {
   description = "Service account resource (for single use)."
-  value       = local.service_accounts_list[0]
+  value       = try(local.service_accounts_list[0], null)
 }
 
 output "email" {
   description = "Service account email (for single use)."
-  value       = local.emails_list[0]
+  value       = try(local.emails_list[0], null)
 }
 
 output "iam_email" {
   description = "IAM-format service account email (for single use)."
-  value       = local.iam_emails_list[0]
+  value       = try(local.iam_emails_list[0], null)
 }
 
 output "key" {
@@ -47,12 +47,12 @@ output "service_accounts_map" {
 
 output "emails" {
   description = "Service account emails by name."
-  value       = zipmap(var.names, local.emails_list)
+  value       = zipmap(local.service_accounts_list[*].name, local.emails_list)
 }
 
 output "iam_emails" {
   description = "IAM-format service account emails by name."
-  value       = zipmap(var.names, local.iam_emails_list)
+  value       = zipmap(local.service_accounts_list[*].name, local.iam_emails_list)
 }
 
 output "emails_list" {