Network-25378: External collaboration is governed by explicit Cross-Tenant Access Policies

[praneeth-0000]

External collaboration is governed by explicit Cross-Tenant Access Policies

[Copilot]

Pull request overview

This pull request adds a new assessment test (25378) to validate that external collaboration is governed by explicit Cross-Tenant Access Policies in Microsoft Entra ID. The test ensures that default outbound B2B collaboration settings block all users and all applications, requiring organizations to explicitly define cross-tenant access policies for external collaboration.

Changes:

• Adds Test-Assessment.25378.ps1 implementing the assessment logic for Cross-Tenant Access Policy validation
• Adds Test-Assessment.25378.md providing risk context and remediation guidance

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 6 comments.

File	Description
src/powershell/tests/Test-Assessment.25378.ps1	New PowerShell assessment test that validates Cross-Tenant Access Policy default outbound settings block all users and applications
src/powershell/tests/Test-Assessment.25378.md	Documentation explaining security risks of unrestricted B2B collaboration and remediation steps

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

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