Describe special identities "This Organization" and "Other Organization"

[cnotin]

"This Organization" was lacking a description, while "Other Organization" had an incorrect description that was copy-pasted from the "Dialup" special identity.

Descriptions are copied from https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2003/cc755321(v=ws.10)#how-selective-authentication-affects-windows-server2003-member-server-authentication

I'm unsure about the best way to link to the "https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2003/cc755321(v=ws.10)#how-selective-authentication-affects-domain-controller-behavior" article that I mentioned but I trust that the maintainers will know :)

[prmerger-automator]

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

[learn-build-service-prod]

Learn Build status updates of commit c25b2f2:

⚠️ Validation status: warnings

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WindowsServerDocs/identity/ad-ds/manage/understand-special-identities-groups.md

• Line 330, Column 6: [Warning: hard-coded-locale - See documentation] Link 'https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2003/cc755321(v=ws.10)#how-selective-authentication-affects-domain-controller-behavior' contains locale code 'en-us'. For localizability, remove 'en-us' from links to most Microsoft sites.
• Line 454, Column 6: [Warning: hard-coded-locale - See documentation] Link 'https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2003/cc755321(v=ws.10)#how-selective-authentication-affects-domain-controller-behavior' contains locale code 'en-us'. For localizability, remove 'en-us' from links to most Microsoft sites.
• Line 330, Column 6: [Suggestion: docs-link-absolute - See documentation] Absolute link 'https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2003/cc755321(v=ws.10)#how-selective-authentication-affects-domain-controller-behavior' will be broken in isolated environments. Replace with a relative link.
• Line 454, Column 6: [Suggestion: docs-link-absolute - See documentation] Absolute link 'https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2003/cc755321(v=ws.10)#how-selective-authentication-affects-domain-controller-behavior' will be broken in isolated environments. Replace with a relative link.

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[learn-build-service-prod]

Learn Build status updates of commit 127ea1e:

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[Court72]

@robinharwood, @Xelu86

Can you review the proposed changes?

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