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Project summary

Secure Integration

Microsoft Graph Local Connector

A local connector for Microsoft 365 data that syncs Teams chats and mail using delegated auth, encrypted token caching, and privacy-first defaults.

Privacy-first local Microsoft 365 connector

Case file

Delivery components
5
Stack elements
6
problem
Needed secure Microsoft 365 access without a heavy hosted middleware layer.
approach
Implemented local delegated auth, token protection, sync commands, and supporting tests and docs.
value
Makes Teams and mail data available to local tools while staying cautious about privacy and scope.
proof
The implementation summary documents auth flow, commands, tests, and security decisions in detail.

Overview

This case is about making Microsoft 365 data available to local tooling without introducing unnecessary hosted middleware. The connector uses delegated authentication with device-code flow, encrypted token caching, and metadata-first export behavior so the default stance remains conservative.

The implementation summary in the internal operations workspace shows a complete slice: auth module, Graph client wrapper, CLI sync commands, setup docs, quick start docs, and test coverage for the client and auth layers.

Delivery surface

  • Device-code authentication for local operators
  • Encrypted token cache with silent refresh
  • Mail and Teams chat sync commands
  • Date-filtered exports with pagination and retry handling
  • Test coverage across auth and client modules

Outputs and artifacts

JSON exports for mail and Teams chat dataDocumented setup and quick-start guidesUnit-tested auth and client layersA CLI surface for auth, config info, mail sync, and chat sync

Technology stack

MSALMicrosoft GraphPythonCLI toolingJSON exportsTests

Related systems and workstreams

Internal integration host workspace

Host workspace containing the Graph connector scripts, docs, tests, and environment templates.

Local Microsoft 365 toolchain

Downstream local workflows that consume synced Teams and mail data without exposing a hosted middleware tier.

Signals from source material

  • The implementation summary records 29 passing tests across auth and client modules.
  • Privacy defaults are explicit: metadata-only exports, encrypted cache, no committed secrets, and gitignored output paths.
  • The documented command surface covers auth, info, sync-mail, and sync-chats with room for future incremental sync and background modes.

Next step

Want the build, not just the summary?

If this is the kind of system you need, the next conversation is usually about the workflow bottleneck, the smallest useful first version, and where the review loop needs to stay visible.

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