Have two new WSUS servers on Windows Server 2012 R2. One is configured as downstream replica - this is the only one that clients are able to connect to.
GPO setup to specify getting updates from the downstream server using client side targeting - two groups Clients and Servers.
The upstream server is synchronising successfully with Microsoft Update.
The downstream server is synchronising successfully with the upstream server.
All computers are showing up in the Unassigned Computers group instead of the Clients and Servers group as specified in the GPs assigned. Have checked the GPs are being assigned correctly to each machine.