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Answer by Tony Gedge for Trying to update windows defender from UNC path...

Another caveat...The Defender GUI runs the update download as one of two processes:MSascui.exe - which uses the current session account (this one can usually access the file share as most defender...

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Answer by Jeff Riechers for Trying to update windows defender from UNC path...

Here is the powershell script I have running hourly on a server, then I just point my clients to it. The big point was NOT to extract the file. Windows Defender points to the exe itself.$vdmpathbase =...

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Answer by Michaja van der Zouwen for Trying to update windows defender from...

I've had this exact issue. The issue was resolved by creating a x64 folder in the share and moving the definitions to that folder. I can't find this requirement anywhere but it works. SCEP uses this...

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Answer by Gunnar Haslinger for Trying to update windows defender from UNC...

Permission Denied Message is caused by Access Denied to the LogFileC:\Windows\Temp\MpSigStub.logJust delete this LogFile before running Update-MpSignature -UpdateSource FileShares -Verbose

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Answer by George Kendros for Trying to update windows defender from UNC path...

Appleoddity's answer gives everything you need. Some caveats though;Update-MpSignature never worked for me in powershell. I spent a lot of time trying to set up the environment for these updates to...

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Answer by Appleoddity for Trying to update windows defender from UNC path...

I have never done this before, but your question made me curious and I started doing some testing. I was able to reproduce your issue. It's clear that not many people do this, because there is zero...

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Trying to update windows defender from UNC path continuously fails

I'm trying to update Windows Defender (on Win 10) using definistions stored on a UNC path.I'm setting the path the the mpam-fe.exe file like thisSet-MpPreference...

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