docs: document domain join workflows

[mchave3]

Summary

Document how to configure and deploy Interactive Domain Join and Zero-touch Domain Join, including organizational unit (OU) placement, what happens in Windows after the join, the outcomes a technician can see and how to troubleshoot them.

Reason

Related to foundry-osd/foundry#218. These pages describe the feature added by foundry-osd/foundry#399, and Foundry OSD links to them as contextual help.

Main changes

• Add five pages: a Domain Join overview, one page per mode, the Deploy-side guide and a troubleshooting page, each listed in SUMMARY.md. The Deploy guide describes the Domain join wizard step and its summary category.
• Write them as usage documentation for administrators and technicians: what to set up, what to click, what the technician sees, and what to do when something goes wrong, without implementation detail.
• Explain the prerequisites, the difference between technician-entered and media-protected credentials, listing several domains with a default, the shared and dedicated join accounts, adding or importing the OUs of each domain, the default OU, renaming an OU, how listing several domains or OUs makes the technician choose among them, and how an existing computer account is moved.
• Describe what happens in Windows: after a verified join, setup ends on the sign-in screen without a local account; after a failed join, the account creation page is kept.
• Describe the separate join, OU placement and membership results, that a failed join is a warning that does not stop Windows installation, and how to handle each console message, an interrupted join and a pending credential cleanup.
• Update the related Autopilot, media, General, deployment profile, machine naming, unattend, post-installation, security and supported-version pages.
• Use the vocabulary and labels of the interface throughout: domains, organizational units, and the default domain and OU.
• Add five screenshots with demonstration data: the page before it is enabled (overview), the Zero-touch and Interactive pages, and the Deploy step on Interactive and on Zero-touch media. No screenshot placeholder remains.
• Rename Protected deployment to Password protection on every page, as the General page labels it, with Deployment password for its field. The heading anchor in foundry-osd/general.md moves from #protected-deployment to #password-protection; the nine internal links follow.

Testing

• Checked every Markdown page of the repository: 366 relative links and their anchors resolve, and all five new pages are in SUMMARY.md.
• git diff --check against main passed.
• Interface labels and console messages were matched to the current en-US strings and runtime messages of the implementation pull request.

Validation not run and reason:

• Rendered output: not previewed in GitBook; this repository has no build or link-check script.

• Live help URLs: the contextual-help links from Foundry OSD cannot be checked until these pages are published.

🤖 Generated with Claude Code

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