SPSUpdate is a PowerShell script tool designed to install cumulative updates in your SharePoint environment.
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SPSUpdate no longer depends on a DSC module. Use PowerShell 5.1 or later on each SharePoint server where you run the script. The script relies on standard PowerShell remoting, scheduled tasks, Credential Manager integration, and native SharePoint update binaries. This is discussed further on the SPSUpdate Wiki Getting-Started
Impersonation is handled using the Invoke-Command cmdlet in PowerShell, together with the creation of a remote session via New-PSSession. In the SPSUpdate script, we authenticate as the InstallAccount and specify CredSSP as the authentication mechanism. This is explained further in the SPSUpdate Wiki Getting-Started
The ProductUpdate action runs the SharePoint update binaries directly. You only need the update files accessible on the target server and a valid InstallAccount.
For detailed usage, configuration, and getting started information, visit the SPSUpdate Wiki
A full list of changes in each version can be found in the change log