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Architecture teardowns, evaluation design, and production playbooks for Microsoft 365 and Azure teams shipping citation-grounded retrieval and AI DevOps review gates.

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Designing Citation-Grounded RAG for Microsoft 365: Permissions, Retrieval, and Evidence

Enterprise permissions, hybrid search, and evaluation gates in Azure environments. How to keep SharePoint ACLs intact, fuse vector and keyword ranking, and abstain when evidence is weak.

9 min read 2026-08-15 RAG Microsoft 365 Azure
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What this note covers

  • Permissions-first ingest: Entra ID group ACLs travel with every chunk.
  • Hybrid retrieval: pgvector plus BM25 merged with Reciprocal Rank Fusion.
  • Evidence gates: Fail closed when top-k scores fall below threshold.

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