SPSUpdate is a PowerShell tool that installs SharePoint Server cumulative updates and runs the post-setup Configuration Wizard (PSConfig) across a farm. It installs the binaries, mounts/upgrades content databases in parallel, runs PSConfig on local and remote servers over CredSSP remoting, and configures the side-by-side token for zero-downtime patching.
Compatible with SharePoint Server 2016, 2019, and Subscription Edition. Requires PowerShell 5.1 or later — no DSC module needed.