Windows 2003 IAS Radius migration to Windows 2008 R2 NPS

Sometime ago I was working with a customer on migrating the windows Server 2003 based Radius - Internet Authentication Service (IAS) to Windows Server 2008 R2 based Network Policy Server (NPS), so I thought to provide the steps as some other blogs are missing some steps:

To perform this migration, perform the following steps:

Copy  IASmigreader.exe from the Windows Server 2008 R2 installation media at \sources\dlmanifests\microsoft-windows-iasserver-migplugin folder to the Windows 2003 server and run as shown below to export the IAS configurations. It will create the configuration file:

Open the IAS.txt file and find the following text:

=================================================
SystemInfo
=================================================
0
16
515

Replace the text with:

=================================================
SystemInfo
=================================================
0000000009
16
515

Save and import the changed file. This is referenced in http://support.microsoft.com/kb/979599

Copy the ias.txt file that is generated in the above command and updated as mentioned above to the Windows Server 2008 R2 and import the configuration like so:

At the 2008 R2 Server:

Open NPS console and verify the configurations have been successfully imported.

Also register your NPS service in Active Directory from the NPS console.

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