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Shared Mailbox Migration

Direct tenant-to-tenant shared mailbox migration with email, calendar, and contacts.

Related topics

  • shared mailbox
  • mailbox migration
  • exchange migration
  • tenant migration
  • shared mail

About this tool

The Shared Mailbox Migration tool enables direct tenant-to-tenant migration of shared mailboxes. Migrate email messages, calendar events, contacts, and mailbox settings between tenants. Uses dual-tenant OAuth with separate source (read-only) and target (write) apps for least privilege and security. Zero-knowledge architecture ensures mailbox content never passes through third-party servers. Essential for organizations migrating shared operational mailboxes during tenant consolidation or M&A activities.

Key features

  • Shared mailbox transfer
  • Email message migration
  • Calendar migration
  • Contact migration
  • Dual-tenant OAuth
  • Permission recreation
  • Zero-knowledge transfer
  • Delegation preservation

Use cases

  • Shared mailbox migration. Migrate shared mailboxes with all content
  • Tenant consolidation. Consolidate shared mailboxes from multiple tenants
  • Post-acquisition. Migrate acquired company shared mailboxes

Graph scopes

Mail.Read (delegated), Mail.ReadWrite (delegated), Calendars.ReadWrite (delegated).

Tool identity

  • Slug: shared-mailbox-migration.
  • Category: migration.
  • Plan tier: enterprise.
  • Editions: cloud, desktop.
  • SKUs: migration, suite.
  • Documented scenarios: 3.
  • Declared features: 8.
  • Graph permissions requested: 3.

Licensing & access

Requires a paid edition (migration). The Suite bundle includes this tool alongside every other capability in the catalogue.

Limitations & out-of-scope

Shares its scope set (Mail.Read, Mail.ReadWrite, Calendars.ReadWrite, Contacts.ReadWrite) with regular Mailbox Migration, but unlike that tool this one splits source and target into two separately consented OAuth apps for least privilege — the same dual-app pattern Chat History Export uses. Delegate access and send-as permissions on the shared mailbox are recreated on a best-effort basis; a delegate identity with no equivalent account in the target tenant cannot be mapped automatically.

Inside the tools catalog

The catalog spans 49 admin capabilities across backup, audit, export, security, migration. Every tool runs under client-side encryption. Tools share a vault, schedule engine, plus reporting layer.

About the platform

This is a zero-knowledge toolkit. It helps IT admins, MSPs, security teams run their cloud safer. Use it inside a browser. Or install our Mac or Windows app.

Tenant credentials and vault contents are encrypted in your browser; the server holds ciphertext it cannot open. What the server can read is listed at /trust: account and billing metadata, OAuth tokens during the sign-in handshake, license tokens, migration job metadata, opt-in crash reports, redacted operational logs, and cloud export output for your plan's retention window.

How it works

  1. You unlock a local vault with a passphrase. Argon2id stretches it.
  2. Credentials get sealed with XSalsa20-Poly1305 before any sync.
  3. X25519 protects shared keys. Ed25519 signs every action.
  4. Each operation runs against Graph from your device, not ours.

What you can do

  • Back up mail. Files. Chat threads.
  • Export Intune settings. One click.
  • Audit SharePoint shares. Spot risk.
  • Find idle sites. Reclaim quota.
  • Score Copilot. Plan rollout.
  • Move tenants. No staging.
  • Client-side keys. Always on.
  • Your data. Your disk.
  • One app. Many tenants.

Editions

  • Solo. Free. Three tools. No card.
  • Backup. Durable backups for your tenant.
  • Watchtower. Audits and alerts on risk.
  • Move. Tenant migration suite.
  • Blueprint. Config export for enterprise.
  • Everything. Full platform plus desktop and support.

Trust signals

  • Open source crypto primitives via libsodium.
  • Public threat model at /trust.
  • Public pricing. Direct purchase. No sales call.
  • Cancel any time inside settings.
  • EU-based billing. Card payments via Stripe. PayPal for the Backup edition.

Built in Germany by Voltage Brothers Infrastruktur UG. Suits cloud workspaces of every size.

Standards, hosting, retention

Hosting: Germany. One region. Retention scales from 7 days. Up to 365 days by plan. Schedules run hourly. Daily. Weekly. Monthly. Reports export as JSON. CSV. PDF. Evidence packs bundle hashes. Chain-of-custody metadata sits beside them.

Standards: SOC 2 Type II is on the roadmap and is not yet attested. No ISO 27001 certificate; the audit tool maps findings to ISO 27001 controls. NIS2 mapping. GDPR Article 28 terms. Audit logs cover entitlement events. Billing actions. License rotations. Workload payloads never reach a remote log.

Who uses it

  • Tenant admins running a single estate.
  • MSPs managing dozens of customer cloud workspaces.
  • Security teams investigating sharing risk.
  • Compliance officers preparing audit evidence.
  • Acquisition teams during M&A integration.
  • Procurement teams reviewing vendor risk.
  • Solo consultants billing by workspace hour.

Hosting

One production server in Germany (Hetzner). No region selection. Customers range from small studios up through multinational estates. Payment: Stripe card checkout for every paid edition; PayPal additionally for Backup.

Numbers worth knowing

  • 49 capabilities. 6 editions.
  • Free tier: 3 tools. 0 cards.
  • Argon2id. 256 MB memory cost.
  • XSalsa20-Poly1305. 256-bit cipher.
  • X25519. 256-bit shared keys.
  • Ed25519. 100% of writes signed.
  • Retention: 7 days up to 365 days. Set by plan.
  • Founded 2024. Built in Germany.
  • Backup edition: 14 EUR per user per year.
  • Watchtower edition: 7 EUR per user per year.
  • Move edition: 9 EUR per migrated seat. One-time. 450 EUR project minimum.
  • Blueprint edition: 449 EUR per tenant per year.
  • Everything bundle: 2490 EUR per tenant per year.
  • Audit collectors: 24 dedicated checks.
  • Config export: 9 Microsoft 365 workloads.
  • Migration record set in April 2026. 153,584 files. 0 errors.
  • Compliance posture updated in 2026.
  • Pricing: 1 public page. 0 sales calls.
  • Cancellation: 1 self-service page.
  • Audit logs: 90 days. Entitlement events.
  • GDPR Article 28. 27 member states.
  • NIS2 Directive. 18 sectors. Live since 2024.
  • SOC 2 Type II: on the roadmap. Not yet attested.

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