Microsoft has fixed a widespread bug that triggered unexpected upgrades from Windows Server 2019 and 2022 to Windows Server 2025, according to bleepingcomputer.com.
The issue, which surfaced in September 2024, caused servers to upgrade overnight to a version for which many administrators lacked proper licenses.
Microsoft previously attributed the problem to misconfigured third-party update management software. However, software developers countered that the issue stemmed from a procedural error on Microsoft's side regarding release speed and classification, bleepingcomputer.com reported.
Resolution of update errors
On Tuesday, Microsoft confirmed the issue is resolved and has re-enabled the upgrade offer via the Windows Update settings panel, the company stated in a Windows release health update.
Users can now once again check for upgrades through the Settings app. Microsoft directed customers toward its documentation for more information on performing in-place upgrades via the Windows Server Setting Dialog.
The fix follows a series of recent emergency patches from the tech giant. Last month, Microsoft released an out-of-band update to address a March 2026 non-security preview update that failed during installation.
Prior to that, the company issued an emergency update to resolve a major issue triggered by March Patch Tuesday security updates. That specific bug broke sign-ins for Microsoft accounts across several major applications, including Edge, Teams, OneDrive, and Microsoft 365 Copilot.
Microsoft also deployed two other out-of-band updates last month. These addressed a Bluetooth device visibility bug and several security vulnerabilities within the Routing and Remote Access Service (RRAS) management tool affecting Windows 11 Enterprise devices.
