You need to lower the TLS security to manually import updates in #WSUS
The endpoints used by #WSUS for manually importing updates like the “Cumulative Update Preview for Windows 10” are not capable of TLS 1.2. So, after installing the TLS hardening via July updates on a WSUS server the import fails with error 80131509.To reenable the import you need to allow the fallback to the less secure […]