Keepit vs Microsoft 365 Native Backup: Do You Need Third-Party? (2026)

Microsoft 365 native backup retains data for a maximum of 1 year. There is no configuration option to extend this. After 12 months, your backup data is gone.

For many Australian businesses, this is a disqualifying limitation. Financial services firms typically retain email for 7 years. Legal practices retain client correspondence indefinitely. Healthcare organisations retain patient communications for decades. Government agencies follow the National Archives of Australia retention schedules, which can require 10+ years for some record classes.

Keepit offers unlimited retention. You set the retention period. There is no cap. Whether you need 1 year, 7 years, or indefinite retention, the pricing does not change.

The 1-year limit also creates a practical problem for investigations. If legal discovers a dispute involving emails from 18 months ago, native backup cannot help. If HR needs to review an employee's communications from two years prior, native backup cannot help. These scenarios are not hypothetical. Our partners encounter them regularly.

This is the core problem with native backup, and it applies to any vendor backing up their own platform.

Microsoft 365 native backup stores your backup data on the same Azure infrastructure as your production M365 tenant. If a ransomware attack targets your Azure tenant, your production data and your backup data are in the same blast radius. If Microsoft experiences a regional Azure outage, your production environment and your backup are both affected. If an administrative error or a compromised global admin deletes data, the backup may be subject to the same access controls.

This is why Microsoft itself recommends third-party backup. Their own documentation states that customers should use independent backup solutions for full data protection. They are not saying this as a courtesy. They are acknowledging that same-platform backup has structural limitations.

Keepit stores your backup on entirely separate infrastructure. No Azure. No Microsoft. A Keepit-owned data centre in Sydney, on hardware that Keepit operates. There is no shared authentication, no shared administrative access, and no shared failure domain between your M365 tenant and your Keepit backups.

Microsoft 365 native backup does not offer immutable storage. There is no write-once mechanism. There is no protection against a compromised administrator deleting or modifying backup data.

Keepit's Merkle tree immutability makes backup data structurally tamper-proof. Once data is written, it cannot be modified or deleted by any account, including Keepit's own administrators. This is not a configuration setting you enable. It is built into the storage architecture.

For organisations pursuing Essential Eight Maturity Level 2 or 3, the ability to demonstrate that backup data cannot be tampered with is increasingly a hard requirement. Auditors ask how immutability works, who can override it, and whether it can be disabled. With Keepit, the answers are: Merkle tree cryptographic hashing, nobody, and no. With Microsoft native backup, there is no immutability to audit.

The absence of immutability also means Microsoft native backup cannot serve as a reliable last line of defence against insider threats. A disgruntled administrator with global admin privileges could potentially access both production data and backup data through the same console.

We distribute Keepit, so we have a commercial interest here. But intellectual honesty matters, and there are scenarios where Microsoft native backup is sufficient.

If your organisation has no regulatory retention requirements beyond 1 year, if you do not need immutable backups for compliance, if your risk tolerance accepts same-vendor backup, and if your M365 environment is the only SaaS application you need to protect, native backup covers the basics at no additional cost.

Small businesses with under 50 users, minimal compliance obligations, and tight budgets may find native backup adequate for day-to-day accidental deletion recovery. The 10-15 minute RPO is actually better than Keepit's 12-hourly schedule for rapid point-in-time recovery of recently changed files.

However, even in these scenarios, we would suggest the business formally documents that they have accepted the risk of same-vendor backup, 1-year retention limits, and no immutability. If that risk is accepted knowingly, native backup is a valid choice. If it is accepted unknowingly because nobody evaluated the limitations, that is a different problem.

For any Australian business with regulatory retention requirements, compliance obligations, or data that matters beyond 12 months, native backup is insufficient on its own. Microsoft agrees with this assessment.

Use Keepit as your primary backup and treat Microsoft native backup as a convenient first line of defence for quick restores of recently deleted items. The two are not mutually exclusive. Native backup gives you fast RPO for the last 12 months. Keepit gives you unlimited retention, immutability, infrastructure independence, and coverage across 16+ SaaS platforms.

We distribute Keepit because backup insurance that lives on the same platform as the thing it protects is not real insurance. Your fire insurance policy is not stored inside the building.

See also: Keepit vs Veeam for M365 | Keepit vs Druva