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:
Replace the text with:
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.
Read my favorites blogs:
Designing a backup less Exchange 2010 Architecture
Step by step guide for upgrading Active Directory from Microsoft Windows 2003 to Microsoft Windows Server 2008
Microsoft Exchange 2010 CAS Array – Steps and Recommendations
Appear Offline in Microsoft Office Communicator Server 2007
Microsoft Exchange 2010 Test cases
Microsoft Exchange Server 2010 Disaster Recovery
Microsoft Exchange Server 2010 Upgrade Guide
Thanks for this.