Module 17 · Cross-Forest, Cross-Tenant Trust

Manish Garg
Manish Garg Associate of (ISC)² · RingSafe
Apr 27, 2026
1 min read
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Last updated: April 29, 2026

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M&A: company A acquires company B. Trust between forests established for “convenience.” Compromise of one becomes compromise of both.

M&A: company A acquires company B. Trust between forests established for “convenience.” Compromise of one becomes compromise of both.

Hybrid AD + Entra: AD Connect bridges; compromise of either side reaches the other.

Multi-tenant Entra: B2B guest accounts persist; compromise of guest tenant reaches host.

The mindset: every trust relationship is a control merge. Document; review annually; remove when not justified.

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