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Major Issue with SonicWall NetExtender & Microsoft 365

There is an issue with SonicWall NetExtender and Microsoft 365 authentication.

The VPN Client NetExtender modifies this key in the registry

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections

Which causes authentication with all Microsoft 365 applications to fail.

This issue kept popping up in my environment over and over, and after deleting this key it fixed. It was only happening on client machines that had Dell SonicWall NetExtender installed. Posting this here so other professionals can see the fix.

Category: VPN Client


  • VivekVivek SonicWall Employee

    Greetings @CyberJames - Thank you for the post. Please could let us know which Netextender client version are you using ?

    A fix for the Issue was made available via the Nx Client version 10.2.336 which was released on 02 Aug 2023. I've included the release notes as well. The Issue ID was SMA-4585

    If you are continuing to face the Issue even with the updated ( 10.2.336 ) Nx client version , please let me know.

  • tsptsp Newbie ✭

    re: SMA-4585 - we are still seeing the same problem intermittently, even after upgrading all NetExtender clients to 10.2.336. When this happens, going into Internet Options/LAN Settings/Automatically Detect Network Settings and rebooting resolves it, at least for a while. We have had a couple of repeats on the same PCs.

  • HeISKingHeISKing Newbie ✭

    We have a customer that has had TWO machines exhibiting this behavior. One of them we had to back all the way down to NetExtender 10.2.234 to get her working again. The other one we have reset her networking to fix her issue, but it comes back every few days. I suspect it coordinates w/ her use of NetExtender. I'd be interested to try the 10.2.237 client, but we need to get these users working again so the 234 client is probably in her future. BTW, both machines are windows pro 11 and both use NetExtender 10.2.236

  • I have a client having the same issue, we have upgraded to 10.2.337 and still have the same issue. I have to reset the internet options every view days to get them back working. Has anyone found a long term fix for this?

  • CyberJamesCyberJames Newbie ✭
    edited November 14

    Delete the key I listed in the thread above. My assumption is you need to reset your connection properties after updating to the newest client for the fix to be fully applied.

  • SeerSeer Newbie ✭

    Still having issues with this on a brand-new PC that has only seen version 10.2.337, installed via Winget. My fix was described here: NetExtender Breaks Connection to Microsoft Services — SonicWall Community

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