ms.service: entra-id
ms.subservice: domain-services
ms.topic: how-to
ms.date: 08/15/2025
ms.author: justinha
ms.reviewer: bochingwa
ms.custom: has-azure-ad-ps-ref, azure-ad-ref-level-one-done
You can use the Azure portal or PowerShell to enable **TLS 1.2 Only Mode**.
## Identify applications that use deprecated TLS versions
Before you enable **TLS 1.2 Only Mode**, it's important to identify applications that still use TLS 1.0 or 1.1, and update them or replace them with alternatives that support TLS 1.2. For more information about apps that are expected to be impacted, see [TLS 1.0 and TLS 1.1 deprecation in Windows](/windows/win32/secauthn/tls-10-11-deprecation-in-windows).
## [**Azure portal**](#tab/portal)
1. In the Azure portal, search for **Domain Services**, and select your Domain Services instance.
1. Select **Security Settings**.
1. If **TLS 1.2 Only Mode** is set to **Disable**, the instance enables TLS versions 1.0 and 1.1. Set **TLS 1.2 Only Mode** to **Enable**, and then click **Save**.
ms.service: entra-id
ms.subservice: domain-services
ms.topic: how-to
ms.date: 09/03/2025
ms.author: justinha
ms.reviewer: bochingwa
ms.custom: has-azure-ad-ps-ref, azure-ad-ref-level-one-done
You can use the Azure portal or PowerShell to enable **TLS 1.2 Only Mode**.
## Prerequisites
You need the [Application Administrator](../role-based-access-control/permissions-reference.md#application-administrator) and [Groups Administrator](../role-based-access-control/permissions-reference.md#groups-administrator) roles in Microsoft Entra ID to change security settings such as **TLS 1.2 Only Mode**.
## Identify applications that use deprecated TLS versions
Before you enable **TLS 1.2 Only Mode**, it's important to identify applications that still use TLS 1.0 or 1.1, and update them or replace them with alternatives that support TLS 1.2. For more information about apps that are expected to be impacted, see [TLS 1.0 and TLS 1.1 deprecation in Windows](/windows/win32/secauthn/tls-10-11-deprecation-in-windows).
## [**Azure portal**](#tab/portal)