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WU_E_NO_SERVER_CORE_SUPPORT
WU_E_NO_SERVER_CORE_SUPPORT is a platform limitation: the requested Windows Update Agent API method is not supported on Server Core. Retrying it with different network settings will not change that limitation.
What to do
- Identify the exact WUA method that failed and replace the workflow with one supported on the installed Windows edition.
- Keep the update process non-interactive and avoid depending on client UI components that are absent on Server Core.
- For automation, check the return code before assuming every WUA interface is available on every Windows installation type.
Microsoft: WUA success and error codes
Microsoft: Windows Update Agent API
Microsoft: Windows Update log files
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