Microsoft's Secret Backup Flaw Leaves Millions Vulnerable To Hackers

Breaking from the tech world: Microsoft's Secret Backup Flaw Leaves Millions Vulnerable To Hackers, according to BleepingComputer (@BleepinComputer) (on March 6, 2026).

Source: https://x.com/BleepinComputer/status/2029925316123066815

While most Microsoft 365 administrators are familiar with the service's backup for mailboxes and SharePoint, few realize its file-level recovery for user OneDrive folders has been a persistent bottleneck, often forcing full-folder restores for single lost documents. That’s about to change, according to internal documents and engineers close to the project. Microsoft is preparing to roll out granular, file-level restore capabilities for OneDrive within its Microsoft 365 Backup service, a move aimed directly at accelerating recovery times and reducing administrative overhead after incidents like ransomware attacks or accidental deletions. The development, first reported by @BleepinComputer, targets a specific pain point in the enterprise cloud stack.

Currently, the Microsoft 365 Backup service, which launched in late 2023, provides comprehensive protection for Exchange Online, SharePoint, OneDrive, and Teams data. However, its restore functionality for OneDrive has lacked the precision many IT teams require. The upcoming enhancement will allow administrators to browse and select individual files or folders for restoration from a specific point-in-time backup, rather than being compelled to recover an entire user’s OneDrive library. This granularity is a standard feature in many third-party backup solutions, and its absence within Microsoft’s native offering has been a notable gap. Engineers close to the project say the feature has been a top request from large enterprise clients who are consolidating vendors and seeking to rely more heavily on Microsoft’s integrated security suite.

For the enterprise, this shift matters because it directly impacts mean time to recovery (MTTR), a critical metric during security and operational incidents. A faster, more surgical restore process minimizes business disruption and allows IT staff to address user needs with greater efficiency. It also strengthens the value proposition of Microsoft’s native backup against a crowded field of third-party vendors like Veeam, Commvault, and Rubrik, who have long touted granular recovery as a key advantage. This move can be seen as part of Microsoft’s broader strategy to build deeper, stickier moats around its 365 ecosystem by subsuming more ancillary services.

The rollout has been anything but smooth, however, with the feature reportedly visible in testing builds for several months but delayed due to integration challenges with the core OneDrive service. According to the BleepingComputer report, the feature is expected to enter public preview in the coming weeks, with general availability likely by the second quarter of 2026. What remains uncertain is the potential cost impact; Microsoft 365 Backup is a paid add-on, and it is unclear if this enhanced functionality will come at a premium or be included in the existing subscription. Administrators should monitor their Microsoft 365 admin centers for the preview announcement and prepare to evaluate the new restore workflows against their current disaster recovery playbooks.

Source: https://x.com/BleepinComputer/status/2029925316123066815