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Update how-windows-update-works.md

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Adding Proxy behavior information as these changes were added last year to all versions of Windows 10+.
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itsrlyAria
2022-04-15 00:16:14 -07:00
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windows/deployment/update/how-windows-update-works.md
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@ -90,6 +90,15 @@ When users start scanning in Windows Update through the Settings panel, the foll
- Windows Update uses the thread ID filtering to concentrate on one particular task.
![Windows Update scan log 1.](images/update-scan-log-1.png)
#### Proxy Behavior
For Windows Update (WU) scans URLs which are used for update detection ([MS-WUSP]: SimpleAuth Web Service | Microsoft Docs, [MS-WUSP]: Client Web Service | Microsoft Docs):
- System proxy is attempted (set using the netsh command).
- If WUA fails to reach the service due to a certain proxy, service, or authentication error code, then user proxy is attempted (generally it is the logged-in user) Note: For intranet WSUS update service URLs, we provide an option via Windows Update policy to select the proxy behavior.
For WU URLs which are NOT used for update detection (download, reporting etc):
- User proxy is attempted.
- If WUA fails to reach the service due to certain proxy, service, or authentication error code, then the system proxy is attempted.
#### Identifies service IDs