hi,men i am testing W2K8R2 for desktop os. but Oa in my company must be installed in it? unfortunately http://technet.microsoft.com/en-us/library/dd631688(WS.10).aspx documents by Microsoft: The ActiveX Installer Service is not included in Windows Server® 2008 R2. If you attempt to install an ActiveX control from your Web browser on a computer running Windows Server 2008 R2, a User Account Control dialog box with a yellow bar will be displayed warning you that the publisher is unknown. anyone can help me ? 3q!!!