http://vmetc.com/2008/10/21/frustrated-with-installing-the-hyper-v-manager-to-remotely-manage-hyper-v-server-2008/

Installing the Hyper-V Manager on Server 2008

From the Hyper-V Configuration Tool Config Guide:

Managing Hyper-V Server Remotely with Windows Server 2008

To enable the Windows Server 2008 Hyper-V Manager MMC:

NOTE: The Hyper-V Manager MMC is automatically installed when the Hyper-V role is enabled on full installations of Windows Server 2008.

In Windows Server 2008, click Start, and then click Server Manager.
Click Add Features.
In Remote Server Administration Tools, click Role Administration Tools. Enable Hyper-V Tools, and then click Next.
Click Install.
After the restart, click Start, click Administrative Tools, and then click Hyper-V Manager.
In the left pane of the MMC, click Hyper-V Manager.
In the Actions menu, click Connect to Server, click Another Computer, and then type the name or IP address of the server that you want to connect to.

Screen shot of the Server Manager Add Features Wizard where you choose to install the Hyper-V Tools.

Then after the reboot you are able to open the Hyper-V Manager and then add your Hyper-V Server 2008 for remote management.

Unfortunately, I received the following error when attempting to connect to my Hyper-V Server 2008.

The problem occurs because Server 2008 and Hyper-V Server are in a workgroup and not a domain. The error I received contains “check that the virtual machine management service is running and that you are authorized to connect to the server.”

After some “angry” Google-ing my best guess for a production deployment resolution is to follow the advice at http://blogs.technet.com/jhoward/archive/2008/03/28/part-1-hyper-v-remote-management-you-do-not-have-the-requested-permission-to-complete-this-task-contact-the-administrator-of-the-authorization-policy-for-the-computer-computername.aspx

Since I was tired of making configuration changes, in a lab setting, and lazy I just disabled the Hyper-V Server 2008 Firewall using a console command I found athttp://www.realtime-windowsserver.com/tips_tricks/2007/08/server_2008_core_crib_sheet.htm.

“Disable the firewall (at least until everything is working):
netsh firewall set opmode disable“

I also found some info about remotely managing a Windows 2008 Server Core firewall athttp://www.petri.co.il/remotely-managing-windows-2008-server-core-firewall.htm.

Finally I was able to connect with the Hyper-V Manager and build a VM.