Error message when you try to back up or export the configuration in ISA Server, in Forefront Threat Management Gateway, Medium Business Edition, or in Windows Essential Business Server 2008: "There is not enough memory to complete the operation"

You try to back up the Microsoft Internet Security and Acceleration (ISA) Server, Microsoft Forefront Threat Management Gateway, Medium Business Edition, or Windows Essential Business Server 2008 configuration. Or, you try to export the ISA Server, Microsoft Forefront Threat Management Gateway, Medium Business Edition, or Windows Essential Business Server 2008 configuration to a file. When you do this, you experience the following symptoms:

• The Exporting definitions progress bar in the Exporting ServerName to path.xml dialog box reaches approximately two-thirds of the way across the dialog box. Then, the export operation stops responding (hangs).
• If you start Windows Task Manager, and then you click the Processes tab, you notice that Mmc.exe uses 50 percent or more of the CPU resources.
• You receive the following message in the notification area:
  Windows - Virtual Memory Minimum Too Low
  Your system is low on virtual memory. Windows is increasing the size of your virtual memory paging file. During this process, memory requests for some applications may be denied. For more information, see Help.
• You receive the following error message:
  ISA Server Error
  ISA Server cannot load the property page.
  There is not enough memory to complete the operation, close other programs, and then try again.

You experience these symptoms if you have a firewall rule that is linked to many large domain sets or to many large URL sets.

This problem occurs because of a memory management problem in the Microsoft XML Core Services 3.0 (MSXML 3.0) component. ISA Server 2004, ISA Server 2006, Microsoft Forefront Threat Management Gateway, Medium Business Edition, and Windows Essential Business Server 2008 use Microsoft XML Core Services 3.0 to translate the data to an .xml file during an export operation. If you have a rule that is linked to many large domain sets or to many large URL sets, Microsoft XML Core Services 3.0 does not successfully translate the ISA Server configuration.

To resolve this problem, install an updated version of Microsoft XML Core Services 3.0. To obtain an updated version of Microsoft XML Core Services 3.0, visit the following Microsoft Web site:Note Microsoft Windows Server 2003 Service Pack 1(SP1) is not required to install this update. However, if you are running ISA Server 2004 on a Windows Server 2003-based computer, you must have Windows Server 2003 SP1 installed together with this update to resolve the problem that is mentioned in the "Symptoms" section.

For more information, click the following article number to view the article in the Microsoft Knowledge Base: