Is there a process to migrate DFS (Distributed File System) with QMM (Quest Migration Manager)?
Migration of DFS falls outside of QMM footprint.
The below link has step by step process of migrating DFS system using native Microsoft processes and tools:
"Migrating your DFS Namespaces in three (sorta) easy steps"
It was also compiled into MS Word document and attached to this article in case link is no longer functioning:
DFS is just a pointer to a share. It allows you to have two or more UNC paths mapped to a single DFS Mount point., therefore, all of the file servers within the environment will have to be processed with RUM.Just the mount points need to be processed with RUM."