There are great tools that do this already in a support-multiple-ecosystems kind of way! I'm actually the CEO of one of those tools: Credal.ai - which lets you point-and-click connect accounts like O365, Google Workspace, Slack, Confluence, e.t.c, and then you can use OpenAI, Anthropic etc to chat/slack/teams/build apps drawing on that contextual knowledge: all in a SOC 2 compliant way. It does use a Retrieval-Augmented-Generation approach (rather than fine tuning), but the core reason for that is just that this tends to actually offer better results for end users than fine tuning on the corpus of documents anyway! Link: https://www.credal.ai/