Microsoft has reminded IT administrators about the expiration of certificates that enable trusted connections between Windows devices and Windows Update servers, set to expire in May and June of 2027. Devices without replacement certificates by these deadlines may lose access to Windows Update services. Most supported Windows devices will receive new certificates automatically through security updates, but older or infrequently updated systems may require manual intervention. Organizations that do not update their devices risk losing access to critical updates, particularly unsupported Windows versions that will not receive necessary certificate updates. IT teams should audit device inventories and ensure compliance with updates, as systems on supported versions will obtain replacement certificates seamlessly. Upgrading unsupported systems is essential, and organizations are encouraged to conduct audits and expedite upgrade projects to avoid losing access to Windows Update.