If you notice that DFS Replication (DFSR) is not replicating certain files, one simple reason is that the temporary attribute is set on them. By design, DFSR does not replicate files if they have the temporary attribute set on them, and it cannot be configured to do so.
This may not be obvious because nearly all the normal methods you would use in Windows to check file attributes do not show the temporary attribute. Specifically, all of the following do not show the temporary attribute - Attrib.exe, Explorer's file properties, FileSystemObject in Windows Scripting Host, and CIM_Datafile in WMI. Also, DFSR does not log any errors to the event log or to the debug logs to show temporary files are not being replicated. There is a relevant entry in the debug logs, but it is not an error because this behavior is by design.