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Building Private RAG: A Blueprint for SharePoint & n8n
Season 2
Published 1 day, 4 hours ago
Description
Most organizations already have the ingredients for enterprise AI success. They have SharePoint. They have years of accumulated knowledge stored across documents, spreadsheets, policies, manuals, contracts, and project files. They may even have access to powerful AI models. Yet when employees ask questions, the answers are often incomplete, inaccurate, or missing entirely.The problem isn't the AI model.The problem is retrieval.In this episode of the M365 FM Podcast, we take a deep dive into building a fully private Retrieval-Augmented Generation (RAG) platform using SharePoint, Microsoft Graph, n8n, Mistral OCR, Azure OpenAI, PostgreSQL, Supabase, and Open WebUI. Rather than focusing on theory, this episode walks through the complete architecture required to transform a traditional SharePoint environment into a secure, enterprise-grade AI knowledge system capable of answering questions based on your organization's own content.
WHAT RAG REALLY IS
Retrieval-Augmented Generation is often described as giving AI access to your documents, but that explanation barely scratches the surface. The reality is that a RAG system introduces an entirely new layer between the user and the language model. This retrieval layer determines what information reaches the model and ultimately dictates the quality of every answer.We explore how vector embeddings work, why semantic search differs fundamentally from keyword search, and why organizations that focus solely on upgrading models often fail to improve answer quality. You'll learn why retrieval accuracy is the true foundation of successful enterprise AI.
WHY SHAREPOINT SEARCH IS NO LONGER ENOUGH
Traditional SharePoint search was designed for finding documents. Modern knowledge workers need answers.Throughout the episode, we examine why keyword-based search struggles to understand intent, context, and meaning. Questions asked in natural language rarely match the exact vocabulary used inside documents, creating a gap between what users need and what traditional search engines can deliver.This discussion highlights how vector search solves the vocabulary problem by searching for meaning rather than words, allowing organizations to unlock knowledge that was previously hidden behind folders, file names, and inconsistent terminology.
BUILDING THE COMPLETE PRIVATE AI ARCHITECTURE
The heart of the episode focuses on the architecture itself. We walk through every layer of the solution, beginning with SharePoint as the primary source of truth and Microsoft Graph API as the bridge between SharePoint and the automation layer.From there, n8n acts as the orchestration engine, coordinating ingestion workflows, retrieval workflows, document processing, and AI interactions. Mistral OCR transforms complex documents into structured content, while Azure OpenAI generates embeddings and powers the language model experience. PostgreSQL and Supabase provide storage and vector search capabilities, while Open WebUI delivers a familiar ChatGPT-style interface for end users.The result is a completely private AI environment where organizations maintain full control over their data, infrastructure, and compliance obligations.
DOCUMENT INGESTION, OCR, AND AGENTIC CHUNKING
One of the biggest challenges in enterprise AI is document preparation. Most organizational knowledge doesn't exist as clean text. Instead, it lives inside PDFs, scanned documents, spreadsheets, images, diagrams, contracts, and complex reports.This episode explores why OCR quality directly impacts retrieval quality and why Mistral OCR has become one of the most compelling options for enterprise document processing. We also dive into agentic chunking, a more advanced approach to document segmentation that uses AI to identify logical boundaries instead of relying on fixed character limits.By preserving context and meaning throughout the ingestio
WHAT RAG REALLY IS
Retrieval-Augmented Generation is often described as giving AI access to your documents, but that explanation barely scratches the surface. The reality is that a RAG system introduces an entirely new layer between the user and the language model. This retrieval layer determines what information reaches the model and ultimately dictates the quality of every answer.We explore how vector embeddings work, why semantic search differs fundamentally from keyword search, and why organizations that focus solely on upgrading models often fail to improve answer quality. You'll learn why retrieval accuracy is the true foundation of successful enterprise AI.
WHY SHAREPOINT SEARCH IS NO LONGER ENOUGH
Traditional SharePoint search was designed for finding documents. Modern knowledge workers need answers.Throughout the episode, we examine why keyword-based search struggles to understand intent, context, and meaning. Questions asked in natural language rarely match the exact vocabulary used inside documents, creating a gap between what users need and what traditional search engines can deliver.This discussion highlights how vector search solves the vocabulary problem by searching for meaning rather than words, allowing organizations to unlock knowledge that was previously hidden behind folders, file names, and inconsistent terminology.
BUILDING THE COMPLETE PRIVATE AI ARCHITECTURE
The heart of the episode focuses on the architecture itself. We walk through every layer of the solution, beginning with SharePoint as the primary source of truth and Microsoft Graph API as the bridge between SharePoint and the automation layer.From there, n8n acts as the orchestration engine, coordinating ingestion workflows, retrieval workflows, document processing, and AI interactions. Mistral OCR transforms complex documents into structured content, while Azure OpenAI generates embeddings and powers the language model experience. PostgreSQL and Supabase provide storage and vector search capabilities, while Open WebUI delivers a familiar ChatGPT-style interface for end users.The result is a completely private AI environment where organizations maintain full control over their data, infrastructure, and compliance obligations.
DOCUMENT INGESTION, OCR, AND AGENTIC CHUNKING
One of the biggest challenges in enterprise AI is document preparation. Most organizational knowledge doesn't exist as clean text. Instead, it lives inside PDFs, scanned documents, spreadsheets, images, diagrams, contracts, and complex reports.This episode explores why OCR quality directly impacts retrieval quality and why Mistral OCR has become one of the most compelling options for enterprise document processing. We also dive into agentic chunking, a more advanced approach to document segmentation that uses AI to identify logical boundaries instead of relying on fixed character limits.By preserving context and meaning throughout the ingestio