Update prepare-for-upload-vhd-image.md

[rafatecoy]

We are missing instructions in order to allow SAC to work properly at serial console. Current document will allow Serial Console to connect, but customers will not be able to use SAC to troubleshoot OS issues, because there are no instructions on how to ensure that sacsvr service is running at guest OS.

[prmerger-automator]

@rafatecoy : Thanks for your contribution! The author(s) and reviewer(s) have been notified to review your proposed change. @genlin

[learn-build-service-prod]

Learn Build status updates of commit 66d1a56:

⚠️ Validation status: warnings

File	Status	Preview URL	Details
articles/virtual-machines/windows/prepare-for-upload-vhd-image.md	⚠️Warning		Details

articles/virtual-machines/windows/prepare-for-upload-vhd-image.md

• Line 317, Column 136: [Warning: hard-coded-locale - See documentation] Link 'https://learn.microsoft.com/en-us/troubleshoot/azure/virtual-machines/windows/serial-console-cmd-ps-commands' contains locale code 'en-us'. For localizability, remove 'en-us' from links to most Microsoft sites.
• Line 317, Column 136: [Suggestion: docs-link-absolute - See documentation] Absolute link 'https://learn.microsoft.com/en-us/troubleshoot/azure/virtual-machines/windows/serial-console-cmd-ps-commands' will be broken in isolated environments. Replace with a relative link.

For more details, please refer to the build report.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.

[Copilot]

Pull request overview

This PR adds documentation for enabling the Special Administration Console (SAC) feature to work properly with Serial Console on Azure VMs. The change provides missing instructions for ensuring the sacsvr service is running, which is necessary for customers to troubleshoot OS issues using SAC.

Changes:

• Added a NOTE section after the Serial Console BCD configuration commands explaining SAC requirements
• Documented different procedures for Windows Server Edition versus Windows Client Edition
• Included reference link to troubleshooting documentation

[v-dirichards]

@genlin

Can you review the proposed changes?

Important: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
#assign: @genlin
@MicrosoftDocs/public-repo-pr-review-team

[v-dirichards]

#assign: @genlin, @JarrettRenshaw @kaushika-msft @peiwgit @Cloud-Writer @aartig13

[prmerger-automator]

The following users don't have valid GitHub IDs, or are not collaborators on this repo: genlin, dcscontentpm

[prmerger-automator]

The following users don't have valid GitHub IDs, or are not collaborators on this repo: genlin, jarrettrenshaw kaushika-msft peiwgit cloud-writer aartig13

[learn-build-service-prod]

Learn Build status updates of commit 127363a:

💡 Validation status: suggestions

File	Status	Preview URL	Details
articles/virtual-machines/windows/prepare-for-upload-vhd-image.md	💡Suggestion		Details

articles/virtual-machines/windows/prepare-for-upload-vhd-image.md

• Line 317, Column 136: [Suggestion: docs-link-absolute - See documentation] Absolute link 'https://learn.microsoft.com/troubleshoot/azure/virtual-machines/windows/serial-console-cmd-ps-commands' will be broken in isolated environments. Replace with a relative link.

For more details, please refer to the build report.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.

[learn-build-service-prod]

Learn Build status updates of commit 72e1d17:

💡 Validation status: suggestions

File	Status	Preview URL	Details
articles/virtual-machines/windows/prepare-for-upload-vhd-image.md	💡Suggestion		Details

articles/virtual-machines/windows/prepare-for-upload-vhd-image.md

• Line 317, Column 136: [Suggestion: docs-link-absolute - See documentation] Absolute link 'https://learn.microsoft.com/troubleshoot/azure/virtual-machines/windows/serial-console-cmd-ps-commands' will be broken in isolated environments. Replace with a relative link.

For more details, please refer to the build report.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.

[github-actions]

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