Hi,I'm currently running a Windows Server 2008 R2 with Exchange 2010. Since this is only a test installation, I configured this machine to hibernate after one hour. However, this doesn't work, the machine doesn't goto sleep. Running "powercfg -energy" doesn't show any indication, what could be reason for that. It may be related to Exchange since the server went to sleep before I installed Exchange. Does anyone know how to enable hibernation on a server running Exchange? Thanks in advance,Clemens

Did you add the Hyper-V role?MVP Setup and Deployment - http://www.forum-microsoft.org

Hi Clemens,Kazer's question makes sense. If the Hyper-V role is enabled on Windows Server 2008, the hiternate power feauter will be not available, and this is dy design.Sleep and hibernate power features are not available when you enable Hyper-V technology on a Windows Server 2008-based portable computerhttp://support.microsoft.com/kb/954418If there is no Hyper-V role, you may refer to the KB 920730 to enable hibernation.How to disable and re-enable hibernation on a computer that is running Windows http://support.microsoft.com/kb/920730Hope it helps.David ShenBest Regards,This posting is provided "AS IS" with no warranties, and confers no rights.

Hi David,Thanks for the information. Unfortunately both hints don't help. Hyper-V isn't enabled and hibernation is enabled. However, the server is not going to sleep. As I mentioned, it might be related to Exchange 2010, since before installing this everything worked as expected.Best Regards,Clemens

That KB mentions the feature is not enable on a portable computer. I am using a server (not in a laptop) and hibernation is not enable. Any ideas why?

Hello , run powercfg /a and report back the output. Also look at the System Event logs for Kernel-Power and Power-Troubleshooter eventsThanks, Darrell Gorter [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights. VAMT - Volume Activation Management Tool - Download link http://www.microsoft.com/downloads/details.aspx?FamilyID=ec7156d2-2864-49ee-bfcb-777b898ad582&displaylang=en

Hi Darrell, this is what I get: C:\Users\Administrator>powercfg /a The following sleep states are not available on this system: Standby (S1) The system firmware does not support this standby state. An internal system component has disabled this standby state. Standby (S2) The system firmware does not support this standby state. An internal system component has disabled this standby state. Standby (S3) The system firmware does not support this standby state. An internal system component has disabled this standby state. Hibernate An internal system component has disabled hibernation. Hybrid Sleep Didn't find any error reltated to this under Kernel-Power and no error has been recorded under Power-Troubleshooter. Thanks.

Hello Machajwai, Have you run powercfg /energy? can you post the output of that? How much RAM in the server? What roles do you have installed?Thanks, Darrell Gorter [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights. VAMT - Volume Activation Management Tool - Download link http://www.microsoft.com/downloads/details.aspx?FamilyID=ec7156d2-2864-49ee-bfcb-777b898ad582&displaylang=en

I just ran it, the output is here: http://it24x7.biz/energy-report.html Server has 8 GB Ram. Basically it is a stand alone server running Hyper-V with 3 VMs. Thanks, Jose

Hi Clemens, Kazer's question makes sense. If the Hyper-V role is enabled on Windows Server 2008, the hiternate power feauter will be not available, and this is dy design. Sleep and hibernate power features are not available when you enable Hyper-V technology on a Windows Server 2008-based portable computer http://support.microsoft.com/kb/954418 If there is no Hyper-V role, you may refer to the KB 920730 to enable hibernation. How to disable and re-enable hibernation on a computer that is running Windows http://support.microsoft.com/kb/920730 Hope it helps. David Shen Best Regards, This posting is provided "AS IS" with no warranties, and confers no rights. Machajwai, Did you miss this part of the discussion. You cannot hibernate a server running Hyper-V!Bill

I didn't, I just wanted to confirm this with all hardware since the title says: Sleep and hibernate power features are not available when you enable Hyper-V technology on a Windows Server 2008-based PORTABLE computer Thanks.

Hello Machajwai, It does apply to desktop machines as well as portable machines, we will get that content updated Thanks, Darrell Gorter [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights. VAMT - Volume Activation Management Tool - Download link http://www.microsoft.com/downloads/details.aspx?FamilyID=ec7156d2-2864-49ee-bfcb-777b898ad582&displaylang=en