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windows/deployment/do/TOC.yml
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items:
- name: Delivery Optimization reference
href: waas-delivery-optimization-reference.md
- name: Delivery Optimization client-service communication
- name: Delivery Optimization workflow, privacy, security, and endpoints
href: delivery-optimization-workflow.md
- name: Using a proxy with Delivery Optimization
href: delivery-optimization-proxy.md

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windows/deployment/do/delivery-optimization-workflow.md
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---
title: Delivery Optimization client-service communication
description: Details of how Delivery Optimization communicates with the server when content is requested to download.
title: Delivery Optimization workflow, privacy, security, and endpoints
description: Details of how Delivery Optimization communicates with the server when content is requested to download including privacy, security, and endpoints.
ms.prod: windows-client
ms.technology: itpro-updates
ms.topic: conceptual
@ -14,23 +14,31 @@ appliesto:
- ✅ <a href=https://learn.microsoft.com/windows/release-health/supported-versions-windows-client target=_blank>Windows 11</a>
- ✅ <a href=https://learn.microsoft.com/windows/release-health/supported-versions-windows-client target=_blank>Windows 10</a>
- ✅ <a href=https://learn.microsoft.com/windows/deployment/do/waas-delivery-optimization target=_blank>Delivery Optimization</a>
ms.date: 12/31/2017
ms.date: 01/18/2024
---
# Delivery Optimization client-service communication explained
# Delivery Optimization workflow, privacy, security, and endpoints
Delivery Optimization is a cloud-managed solution that uses peer-to-peer (P2P) and local caching to deliver software updates and apps to Windows clients across your network. This article describes details of how Delivery Optimization communicates with the server when content is requested to download.
## Download request workflow
Delivery Optimization is a cloud-managed solution that uses peer-to-peer (P2P) and local caching to deliver software updates and apps to Windows clients across your network. This article describes details of how Delivery Optimization communicates with the server when content is requested to download and contains information about privacy, security, and endpoints.
This workflow allows Delivery Optimization to securely and efficiently deliver requested content to the calling device. Delivery Optimization uses content metadata to verify the content and to determine all available locations to pull content from.
## How we help keep your data safe
Delivery Optimization can't be used to download or send personal content. Delivery Optimization doesn't access personal files or folders, and it doesn't change any files on the device.
Delivery Optimization downloads the same updates and apps that you would get through [Windows Update](../update/windows-update-security.md), Microsoft Store apps, and other Microsoft updates using the same security measures. To make sure you're getting authentic updates, Delivery Optimization gets information securely from Microsoft to check the authenticity of each part of an update or app that it downloads from other PCs. The authenticity of the downloads is checked again before installing it. <!--8658744-->
## Download request workflow
This workflow allows Delivery Optimization to securely and efficiently deliver requested content to the calling device and explains client-service communication. Delivery Optimization uses content metadata to verify the content and to determine all available locations to pull content from.
1. When a download starts, the Delivery Optimization client attempts to get its content metadata. This content metadata is a hash file containing the SHA-256 block-level hashes of each piece in the file (typically one piece = 1 MB).
2. The authenticity of the content metadata file itself is verified prior to any content being downloaded using a hash that is obtained via an SSL channel from the Delivery Optimization service. The same channel is used to ensure the content is curated and authorized to use peer-to-peer.
3. When Delivery Optimization pulls a certain piece of the hash from another peer, it verifies the hash against the known hash in the content metadata file.
4. If a peer provides an invalid piece, that piece is discarded. When a peer sends multiple bad pieces, it's banned and will no longer be used as a source by the Delivery Optimization client performing the download.
5. If Delivery Optimization is unable to obtain the content metadata file, or if the verification of the hash file itself fails, the download will fall back to "simple mode”. Simple mode will only pull content from the HTTP source and peer-to-peer won't be allowed.
5. If Delivery Optimization is unable to obtain the content metadata file, or if the verification of the hash file itself fails, the download will fall back to simple mode. Simple mode will only pull content from the HTTP source and peer-to-peer won't be allowed.
6. Once downloading is complete, Delivery Optimization uses all retrieved pieces of the content to put the file together. At that point, the Delivery Optimization caller (for example, Windows Update) checks the entire file to verify the signature prior to installing it.
## Delivery Optimization service endpoint and data information
|Endpoint hostname | Port|Name|Description|Data sent from the computer to the endpoint

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---
author: paolomatarazzo
ms.author: paoloma
ms.topic: include
ms.date: 01/11/2024
---
:::row:::
:::column span="1":::
:::image type="content" source="../images/insider.png" alt-text="Logo of Windows Insider." border="false":::
:::column-end:::
:::column span="3":::
> [!IMPORTANT]
>This article describes features or settings that are under development and only applicable to [Windows Insider Preview builds](/windows-insider/). The content is subject to change and may have dependencies on other features or services in preview.
:::column-end:::
:::row-end:::

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windows/deployment/windows-autopatch/TOC.yml
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- name: What's new
href:
items:
- name: What's new 2024
href: whats-new/windows-autopatch-whats-new-2024.md
- name: What's new 2023
href: whats-new/windows-autopatch-whats-new-2023.md
- name: What's new 2022

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windows/deployment/windows-autopatch/prepare/windows-autopatch-prerequisites.md
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---
title: Prerequisites
description: This article details the prerequisites needed for Windows Autopatch
ms.date: 12/04/2023
ms.date: 01/11/2024
ms.prod: windows-client
ms.technology: itpro-updates
ms.topic: conceptual
@ -36,12 +36,19 @@ Windows Autopatch is included with Windows 10/11 Enterprise E3 or higher (user-b
| [Microsoft 365 E3](/azure/active-directory/enterprise-users/licensing-service-plan-reference) | SPE_E3 | 05e9a617-0261-4cee-bb44-138d3ef5d965 |
| [Microsoft 365 E3 (500 seats minimum_HUB)](/azure/active-directory/enterprise-users/licensing-service-plan-reference) | Microsoft_365_E3 | 0c21030a-7e60-4ec7-9a0f-0042e0e0211a |
| [Microsoft 365 E3 - Unattended License](/azure/active-directory/enterprise-users/licensing-service-plan-reference) | SPE_E3_RPA1 | c2ac2ee4-9bb1-47e4-8541-d689c7e83371 |
| Microsoft 365 E3 EEA (no Teams) - Unattended License | Microsoft_365_E3_EEA_(no_Teams)_Unattended_License | a23dbafb-3396-48b3-ad9c-a304fe206043 |
| Microsoft 365 E3 EEA (no Teams) (500 seats min)_HUB | O365_w/o Teams Bundle_M3_(500_seats_min)_HUB | 602e6573-55a3-46b1-a1a0-cc267991501a |
| [TEST - Microsoft 365 E3](/azure/active-directory/enterprise-users/licensing-service-plan-reference) | SPE_E3_TEST | 23a55cbc-971c-4ba2-8bae-04cd13d2f4ad |
| [Microsoft 365 E5](/azure/active-directory/enterprise-users/licensing-service-plan-reference) | SPE_E5 | 06ebc4ee-1bb5-47dd-8120-11324bc54e06 |
| [Microsoft 365 E5 (500 seats minimum)_HUB](/azure/active-directory/enterprise-users/licensing-service-plan-reference) | Microsoft_365_E5 | db684ac5-c0e7-4f92-8284-ef9ebde75d33 |
| [Microsoft 365 E5 with calling minutes](/azure/active-directory/enterprise-users/licensing-service-plan-reference) | SPE_E5_CALLINGMINUTES | a91fc4e0-65e5-4266-aa76-4037509c1626 |
| [Microsoft 365 E5 without audio conferencing](/azure/active-directory/enterprise-users/licensing-service-plan-reference) | SPE_E5_NOPSTNCONF | cd2925a3-5076-4233-8931-638a8c94f773 |
| [Microsoft 365 E5 without audio conferencing (500 seats minimum)_HUB](/azure/active-directory/enterprise-users/licensing-service-plan-reference) | Microsoft_365_E5_without_Audio_Conferencing | 2113661c-6509-4034-98bb-9c47bd28d63c |
| [TEST - Microsoft 365 E3](/azure/active-directory/enterprise-users/licensing-service-plan-reference) | SPE_E3_TEST | 23a55cbc-971c-4ba2-8bae-04cd13d2f4ad |
| Microsoft 365 E5 EEA (no Teams) | O365_w/o_Teams_Bundle_M5 |3271cf8e-2be5-4a09-a549-70fd05baaa17 |
| Microsoft 365 E5 EEA (no Teams) with Calling Minutes | Microsoft_365_E5_EEA_(no_Teams)_with_Calling_Minutes | 6ee4114a-9b2d-4577-9e7a-49fa43d222d3 |
| Microsoft 365 E5 EEA (no Teams) without Audio Conferencing | Microsoft_365_E5_EEA_(no_Teams)_without_Audio_Conferencing | 90277bc7-a6fe-4181-99d8-712b08b8d32b |
| Microsoft 365 E5 EEA (no Teams) without Audio Conferencing (500 seats min)_HUB | Microsoft_365_E5_EEA_(no_Teams)_without_Audio_Conferencing_(500_seats_min)_HUB | a640eead-25f6-4bec-97e3-23cfd382d7c2 |
| Microsoft 365 E5 EEA (no Teams) (500 seats min)_HUB | O365_w/o_Teams_Bundle_M5_(500_seats_min)_HUB | 1e988bf3-8b7c-4731-bec0-4e2a2946600c |
| [TEST - Microsoft 365 E5 without audio conferencing](/azure/active-directory/enterprise-users/licensing-service-plan-reference) | SPE_E5_NOPSTNCONF_TEST | 1362a0d9-b3c2-4112-bf1a-7a838d181c0f |
| [Windows 10/11 Enterprise E3](/azure/active-directory/enterprise-users/licensing-service-plan-reference) | WIN10_VDA_E3 | 6a0f6da5-0b87-4190-a6ae-9bb5a2b9546a |
| [Windows 10/11 Enterprise E5](/azure/active-directory/enterprise-users/licensing-service-plan-reference) | WIN10_VDA_E5 | 488ba24a-39a9-4473-8ee5-19291e71b002 |

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windows/deployment/windows-autopatch/whats-new/windows-autopatch-whats-new-2024.md Normal file
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---
title: What's new 2024
description: This article lists the 2024 feature releases and any corresponding Message center post numbers.
ms.date: 01/11/2024
ms.prod: windows-client
ms.technology: itpro-updates
ms.topic: whats-new
ms.localizationpriority: medium
author: tiaraquan
ms.author: tiaraquan
manager: dougeby
ms.reviewer: hathind
ms.collection:
- highpri
- tier1
---
# What's new 2024
This article lists new and updated feature releases, and service releases, with their corresponding Message center post numbers (if applicable).
Minor corrections such as typos, style, or formatting issues aren't listed.
## January 2024
### January feature releases or updates
| Article | Description |
| ----- | ----- |
| [Prerequisites](../prepare/windows-autopatch-prerequisites.md#more-about-licenses) | Added more E3 and E5 licenses to the [More about licenses](../prepare/windows-autopatch-prerequisites.md#more-about-licenses) section. |