---
title: Select a primary domain
description: The primary domain indicates the top-level domain in the domain map.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/australia/platform-security/t\_SelectAPrimaryDomain.html
release: australia
topic_type: task
last_updated: "2026-03-12"
reading_time_minutes: 1
breadcrumb: [View domain relationships, Setup and administration, Domain separation for service providers, Access Management]
---

# Select a primary domain

The primary domain indicates the top-level domain in the domain map.

## Before you begin

Role required: admin

## About this task

The primary domain cannot have a parent domain and must have at least one child domain. There can only be one primary domain at a time. If you select another domain as the primary domain, it overrides the previous primary domain.

## Procedure

1.  Navigate to **All** > **Domain Admin** > **Domains**.

2.  Select the domain you want to be the primary domain, for example, TOP.

3.  Select the **Primary** check box.

4.  Click **Update**.

    \[Omitted image "Primary\_domain.png"\] Alt text: Selecting a primary domain