We ran into an issue with Windows Update where it failed to detect new updates. Below is a Msft article which I copied and pasted
Tag: WSUS
Windows Update Command Line Utility Switches
Below are the switches you can run along with wuauclt. Example: wuauclt /detectnow /DetectNow /ReportNow /RunHandlerComServer /RunStoreAsComServer /ShowSettingsDialog /ResetAuthorization /ResetEulas /ShowWU /ShowWindowsUpdate /SelfUpdateManaged /SelfUpdateUnmanaged /UpdateNow