Server - Microsoft File Server Migration Toolkit 1.2 and Migrate Server 2003 File Servers to Server 2012 R2

The wizards in the File Server Migration Toolkit use Distributed File System (DFS) to maintain Universal Naming Convention (UNC) paths and to simplify the consolidation and migration process

Download:

http://www.microsoft.com/en-us/download/details.aspx?id=10268

Overview of the Microsoft File Server Migration Toolkit - Manual Download

http://www.microsoft.com/en-us/download/details.aspx?id=17959

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Here is a relative webcast that explain how to Migrate Server 2003 File Servers to Server 2012 R2 minimizing downtime, preserving permissions and utilizing precedent tool.

consider that you need to register on that website to view relative videos.

http://www.netometer.com/video/tutorials/Server-2003-Migrate-Storage-to-Server-2012/step1/index.php

http://www.netometer.com/video/tutorials/Server-2003-Migrate-Storage-to-Server-2012/step2/index.php

Further articles:

https://technet.microsoft.com/en-us/library/jj863566.aspx