Microsoft is working to fix a known issue affecting Windows Server Update Services (WSUS) servers, which has caused synchronization problems for more than a week.
WSUS was introduced almost twenty years ago to help IT administrators schedule updates for Microsoft products on enterprise networks from a single local update server, rather than updating each endpoint directly from Redmond's servers.
By default, WSUS syncs with Microsoft Update servers once a day to download the latest metadata for available Windows updates. However, on servers affected by this issue, synchronization is broken, and admins will not be able to deploy the latest Windows updates via WSUS or Configuration Manager.
According to Microsoft, the WSUS sync issues affect both client (Windows 10, version 1607 and later) and server (Windows Server 2012 and later) platforms.
"Organizations might experience increased synchronization times or sync operation timeouts on WSUS servers. This issue began in recent days, with heightened impact observed starting July 13, 2026," Microsoft said in a Windows health dashboard update.
