We have one production server Windows 2016 EN Standard, which runs a critical information system that prints to shared printers, which must be available on the server as local, so they are installed locally on the local port "\\Station\SharedPrinter".
About 40 such printers are defined on the server.
From the May cumulative update (and dtto lasts in the June and July updates) after the restart, most of the local ports of these printers will no longer be visible for the print server, even though they are in the registry.
Get-Printer - lists all printers including all their local ports before and after the update
Get-ItemProperty 'registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Ports' - lists all ports before and after the update
Get-PriterPorts - lists ALL printer ports before applying the cumulative update
- after the update it will list only SEVERAL ports.
Consequently, printers whose ports are missing in the Get-PriterPorts listing do not (logically) work.
Uninstalling the cumulative update (currently 2020-07 KB4565511) returns the situation to a functional state.
Does anyone have an idea what it is or how to fix it?