I have been testing DSC and just upgraded the Pull server from WMF 4 to 5 preview. I have two nodes (1 WMF4 and 1 WMF5 preview). When the pull server was WMF4 everything worked fine on both servers. After upgrading the pull server to WMF5 preview and after pushing the LCM configurations to the nodes; the node with WMF4 does not seem to be getting the configuration. When i run a test-dscconfiguration or get-dscconfiguration I get a “Test-DSCConfiguration : current configuration does not exist”
I encountered similar issue when I test WMF 5 preview. I think some syntax are not compatible and I have to install WMF 5 on both nodes and server to get it work!
Mike Robbins has a great post discussing the issue and a quick script to regex change some of the formatting in a .mof that was generated on a PS Version 4 host to work with Version 5 LCM.