M365 AtlasSecure Microsoft 365 Backups

Open-source CLI and SDK for encrypted, deduplicated backups of Outlook, OneDrive, and SharePoint to S3-compatible storage.

Per-Tenant Encryption

Each tenant gets its own AES-256-GCM data key derived via scrypt. Data stays encrypted even if storage is breached.

Messages, attachments, and files are keyed by SHA-256 hash, so identical content is stored once across snapshots.

S3/MinIO Object Lock with time-based retention, enforced by storage itself rather than application metadata.

Microsoft Graph delta queries drive incremental backups, with automatic full-scan fallback after an interrupted run.

Outlook mailboxes, OneDrive files, and SharePoint document libraries in one tool under one encryption model.

Replicate encrypted snapshots to secondary S3 targets for disaster recovery across every workload.

@wisecom/atlas-cli for shell deployment and cron jobs. @wisecom/atlas-sdk for embedding in Node.js apps through a typed, namespaced API.