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Since a recent web server migration to Windows Server 2019, when someone tries to access files in a UNC share remotely via VPN (programmatically or via File Explorer) , it causes a WebDAV request with the PROPFIND method. The UNC share is not inside the web root, is not listed as a virtual directory, and is not even on the same drive. These requests to not occur when accessing the share from inside our network.

  • WebDAV Publishing is not installed in the Add Roles and Features UI (Web Server (IIS) > Web Server > Common HTTP Features > WebDAV Publishing)
  • WebDAV is not listed as an installed module in IIS

What is causing these requests, and how can I prevent them? I just want the UNC share to be a normal shared folder - not accessible from the web.

User-Agent making the requests: Microsoft-WebDAV-MiniRedir/10.0.18363

Rick
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  • `Microsoft-WebDAV-MiniRedir` is the so called WebDAV Redirector, https://learn.microsoft.com/en-us/iis/publish/using-webdav/using-the-webdav-redirector and it is part of default Windows installation so you cannot turn it off. – Lex Li Jan 11 '22 at 23:04
  • @LexLi I didn't map the share to a URL though, so I can't figure out why going to the share in File Explorer is causing a web request. – Rick Jan 12 '22 at 13:45
  • It is difficult to reproduce your problem, I suggest you open a case via: https://support.microsoft.com. – samwu Jan 14 '22 at 09:26

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