AD RMS: How to Exclude Users Based on Their Version of Windows
The Microsoft® Windows® Rights Management Services (RMS) 1.0 client is supported on computers that are running either Microsoft Windows 98 Second Edition or Windows Millennium Edition; however, these operating systems do not support NTLM authentication. For this reason, you might want to prevent users from consuming rights-protected content from a computer that is running one of these operating systems and require that they use versions of Windows later than Windows Millennium Edition for increased security of your content.
When you set an exclusion policy to exclude users based on Windows version, a condition is placed in all use licenses that prevent them from being used on clients that are running Windows 98 Second Edition and Windows Millennium Edition. You must enable Windows version exclusion on the Exclusion policies page of the administration Web site of each cluster on which you want it to take effect.
To exclude users who are running a certain version of Windows
Log on to the computer with a user account that is a member of the local Administrators group.
Click Start, point to All Programs, point to Windows RMS, and then click Windows RMS Administration to open the Global Administration page.
Next, to the Web site on which you want to exclude Windows versions, click Administer RMS on this Web site.
In the Administration links area, click Exclusion policies.
In the Windows version exclusion area, click Enable to exclude Microsoft® Windows 98 Second Edition, and Microsoft® Windows Millennium Edition.
To disable the exclusion of these Windows versions, click Disable.