Do I need a third-party backup for Microsoft 365?
Usually yes, either Microsoft 365 Backup (the Microsoft add-on) or a third-party backup product. Microsoft 365 provides retention, versioning, and 93-day recycle bins that recover from routine deletion; it does not provide the point-in-time restore of a full mailbox, site, or OneDrive that most compliance frameworks and ransomware playbooks require.
Cases where native retention is enough
- Recovering an individual deleted email or file within retention windows.
- Rolling back a bad edit via SharePoint version history.
- Tenants under a compliance hold that keeps content indefinitely for eDiscovery.
Cases where a backup product is needed
- Ransomware or mass-delete: restoring thousands of items to a moment in time.
- Restoring a full site or mailbox after a bad automation run.
- Cross-tenant restore during M&A or divestiture.
- Compliance frameworks (ISO 27001, SOC 2, NIS2, DORA) that expect a documented backup and restore capability.
- Long-term archive beyond native retention ceilings without a hold obligation.
Choosing between Microsoft 365 Backup and a third party
- Microsoft 365 Backup: Microsoft-native, no data leaves the service boundary, per-GB pricing, restore paths native to Exchange / SharePoint / OneDrive.
- Third parties (Veeam, Commvault, Barracuda, AvePoint, Rubrik, HYCU, Keepit, Redstor): more mature cross-tenant restore, off-Microsoft copy, longer track record, licensing usually per-user.
Read next
- Microsoft 365 backup and recovery— What Microsoft 365 protects natively, what it doesn't, and how to design backup for Exchange, OneDrive, SharePoint, and Teams — native Backup vs third party.
- Microsoft 365 Backup deep dive— Microsoft's first-party backup service for Exchange, OneDrive, and SharePoint — what it does and how it differs from third-party tools.
- Microsoft 365 Backup partner ecosystem— How Microsoft 365 Backup partners use the Backup Storage API — and how to evaluate first-party vs partner solutions.