M365 AtlasSecure Microsoft 365 Backups

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

Per-Tenant Encryption

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

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

S3/MinIO Object Lock with time-based retention enforced by storage itself, not app metadata.

Microsoft Graph delta queries for incremental backups with automatic full-scan fallback on interrupted runs.

Back up Outlook mailboxes, OneDrive files, and SharePoint document libraries with a single tool and unified encryption.

Replicate encrypted snapshots to secondary S3 targets for disaster recovery across all workloads.

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

Programmatic API for embedding in other Node.js applications via the standalone @wisecom/atlas-sdk package.