To ensure the best level of protection, Microsoft Update allows for rapid releases, which means smaller downloads on a frequent basis. Thus, the delta can be larger, resulting in larger downloads. If you have set Microsoft Security intelligence page updates as a fallback source after Windows Server Update Service or Microsoft Update, updates are only downloaded from security intelligence updates when the current update is considered out-of-date.
By default, this is seven consecutive days of not being able to apply updates from the Windows Server Update Service or Microsoft Update services. You can, however, set the number of days before protection is reported as out-of-date. Devices must be updated to support SHA-2 in order to get the latest security intelligence updates. Each source has typical scenarios that depend on how your network is configured, in addition to how often they publish updates, as described in the following table:.
If you set Windows Server Update Service as a download location, you must approve the updates, regardless of the management tool you use to specify the location. You can set up an automatic approval rule with Windows Server Update Service, which might be useful as updates arrive at least once a day.
To learn more, see synchronize endpoint protection updates in standalone Windows Server Update Service. The procedures in this article first describe how to set the order, and then how to set up the File share option if you have enabled it. Double-click the Define the order of sources for downloading security intelligence updates setting and set the option to Enabled.
Double-click the Define file shares for downloading security intelligence updates setting and set the option to Enabled. Specify the file share source. If you have multiple sources, enter each source in the order they should be used, separated by a single pipe. If you do not enter any paths, then this source will be skipped when the VM downloads updates. Click OK. This will set the order of file shares when that source is referenced in the Define the order of sources This article describes how to configure and manage updates for Microsoft Defender Antivirus.
However, third-party vendors can be used to perform these tasks. For example, suppose that Contoso has hired Fabrikam to manage their security solution, which includes Microsoft Defender Antivirus. Fabrikam typically uses Windows Management Instrumentation , PowerShell cmdlets , or Windows command-line to deploy patches and updates.
On the system on which you want to provision the share and download the updates, create a folder to which you will save the script. Download the PowerShell script from www. I've setup a WSUS server on an air-gapped, disconnected network. Regular Windows updates are working. I had set the fallback order for Windows Defender definitions to the entire piped order as in the example in the GPO, but have since changed it to be just "InternalDefinitionUpdateServer" as in your screenshot.
Since doing that I'm not seeing the "The server name or address could not be resolved" error any longer in Event Viewer, but the client computer is still not downloading the definition updates.
Now that I've changed the Fallback Order to just "InternalDefinitonUpdateServer" I no longer get the "server not found" issue and there isn't an event logged in the "Windows Defender" log when I try to update the definitions.
There is an event listed on the WindowsUpdateClient log. I think the DNS issue is cleared up now, but the issue appears to be that there are Definition updates sitting on the WSUS server and WSUS sees that the client computer needs them, but when checking for updates from the client zero updates are found? According to the above description, it seems that the clients haven't tried to check for security intelligence updates for several days. Could we try to check for updates manually first? We could follow the below screenshots and click the following icons:.
I did have my internal WSUS server's address listed in "Set the alternate download server:" I've removed that and will check for definition updates later today and report back.
TimLewis Thanks for your feedback. I'm still tweaking the process of downloading WSUS updates on a server connected to the Internet, then copying them across to a server on a closed network.
I feel pretty confident I have everything dialed-in and have gotten regular Windows updates to be successful. I have one definition update which the air-gapped WSUS server knows the client Win10 machine needs and which is approved for installation. I discovered under "File Status" for that update it says the "file for this update has not yet been downloaded" that's the only update which says this. On the Internet connected WSUS server the definition update is approved and there is not message about the update not being downloaded yet.
I have read that when importing the updates' metadata, if an update is not approved it may show as needing to be downloaded even though the update file was copied across and is actually there.
I think this might be where I need to be looking to see why the Definition update is downloaded and approved on the Internet connected WSUS, but showing that it's not downloaded yet approved once it gets copied across to the air-gapped WSUS server. I'm wondering if the problem is that one or many of those have a problem? Maybe some of the delta files were deleted because they were seen as superseded? Still digging for a solution I suspect that the needed updates are not approved on the connected WSUS server.
So the needed updates could not downloaded. Please follow the below screenshots to confirm whether the the Binary update files stay on the disconected WSUS server. Please try to approve the updates on the connected WSUS server. Thanks for sticking with me, I've tried researching my problem but I just can't find any solution that works. I checked one of the updates on my disconnected WSUS server that says the file hasn't been downloaded yet.
My connected and disconnected WSUS servers look the same, the update is approved on both servers, and the file is on both servers in the same Content folder location.
The update is available on the connected WSUS server, but the disconnected server shows the file needs to be downloaded, yet the update is approved and the update file is in the Content folder where it should be.
This method can be useful for computers that are not often connected to the business network. Updates from UNC file shares - With this method, you can save the latest definition and engine updates to a share on the network.
Clients can then access the network to install the updates. You can configure multiple definition update sources and control the order in which they are assessed and applied.
This is done in the Configure Definition Update Sources dialog box when you create an antimalware policy. Use the following procedure to configure the definition update sources to use for each antimalware policy.
Open the properties page of the Default Antimalware Policy or create a new antimalware policy. For more information about how to create antimalware policies, see How to create and deploy antimalware policies for Endpoint Protection. In the Security Intelligence updates section of the antimalware properties dialog box, click Set Source.
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