Windows: 2003 to 2008 R2 RADIUS Migration

I found myself doing yet another Windows 2003 IAS Radius server migration to 2008 R2 NPS. I found that I had my prior notes and was able to do this quickly but, hell, if I’m looking this up in my own notes I may as well just post this succinct little procedure.

Copy %windir%\syswow64\iasmigreader.exe (this may also be on the installation media at \sources\dlmanifests\microsoft-windows-iasserver-migplugin) from the 2008 server to the 2003 server and run. It will spit out where the backup file was created. Copy this over

Copy the ias.txt file that is generated back to the 2008 R2 server and import the configuration like so:

At the 2008 R2 Server:

Don’t forget to register your NPS service in AD or configuration settings be damned, NPS will just will not work.