Defender network validation invalid command argument

Question

Following the instructions on https://learn.microsoft.com/en-us/microsoft-365/security/defender-endpoint/configure-network-connections-microsoft-defender-antivirus?view=o365-worldwide

I ran Cmd as administrator with the results below.

 

C:\Windows\system32>cd "%ProgramFiles%\Windows Defender"

C:\Program Files\Windows Defender>.\MpCmdRun.exe -ValidateMapsConnection

CmdTool: Failed with hr = 0x80070667. Check C:\Users*<redacted>*_~1\AppData\Local\Temp\MpCmdRun.log for more information

CmdTool: Invalid command line argument

 

I found only start and stop times in MpCmdRun.log - nothing of value.

I checked MpCmdRun.exe -h and found no reference to this parameter.

How can I validate my network connection for Microsoft Defender?

Answer 1

@Cliff 591 ,

I'm glad that you were able to resolve your issue and thank you for posting your solution so that others experiencing the same thing can easily reference this! Since the Microsoft Q&A community has a policy that "The question author cannot accept their own answer. They can only accept answers by others ", I'll repost your solution in case you'd like to "Accept " the answer.

Issue:

Running the -ValidateMapsConnection command you received the error "Invalid command line argument"

Solution:

Your malware settings were preventing you from updating Defender. After suspending the malware protection app, you were able to resolve the issue.

If you have any other questions or are still running into more issues, please let me know.
Thank you again for your time and patience throughout this issue.

Please remember to "Accept Answer" if the reply accurately described the solution, so that others in the community facing similar issues can easily find the solution.

Answer 2

Hi @Cliff 591 ,

The error code 0x80070667 means that you're running the -ValidateMapsConnection command from a computer that is Windows 10 version 1607 or older, or Windows Server 2016 or older. You need to run the command from a machine that is Windows 10 version 1703 or newer, or Windows Server 2019 or newer.

This is documented in the guide, Common errors in running commands via mpcmdrun.exe

See also: Defender errors

Let me know if this helps and if you have further questions.

If the information helped you, please Accept the answer. This will help us as well as others in the community who may be researching similar information.

Answer 3

The problem was our malware settings are strict.

Turn suspend the malware protection app and we can update Defender.