Very Slow Upload Speeds to SharePoint Document Libraries?

Using Windows 7 or Windows Server 2008 R2? The problem could be the LAN settings in Internet Explorer.

Here at Content Master we've been trying to get to the bottom of a problem where some users were having trouble uploading files to a SharePoint 2007 deployment. In each case, the users were opening the document library in Windows Explorer and dragging files across (in other words, uploading files using WebDAV over SSL). Reported upload speeds were dropping as low as 1-2kb/second and users were cursing SharePoint left, right and centre.

The front end server and the database server were showing very little load, and the fact that some users seemed unaffected suggested that this was a client-side problem. After much head-scratching, I stumbled across a post from SharePointNation, and a thread on TechNet, that reported how a similar problem was solved by changing the LAN settings in Internet Explorer. I tried it myself, with some degree of scepticism - and it immediately solved the problem for all affected users (IE9 in our case, but I believe the same applies to other versions). Here are the steps:
  1. In Internet Explorer, on the Tools menu, click Internet Options.
  2. On the Connections tab, click LAN settings.
  3. On the Local Area Network (LAN) Settings dialog, under Automatic configuration, clear the Automatically detect settings check box.

I hope this post saves someone from a headache...


  1. Wow! I was about to punch my computer in the face! You saved it! I had slow navigation through the browser (IE) and slow uploads. I thought I could get around that by going to Explorer View and just dragging and dropping, etc. Nope... When I changed to the Explorer View my whole browser would pretty much freeze up until FINALLY it would load it. Then removing one simple check mark later (Automatically detect settings) BAM!

    Thanks again.

  2. Massive improvement. Thanks!!

  3. For testing purposes, I was uploading 1 million 1 KB file at a rate of 1 bytes/second. It would have taken me close to 5 years to upload that many files. Your solution worked for me. Very helpful. Thanks! But, really like to know why such a simple solution makes a huge difference?

  4. WOW, I usually never comment on posts but WOW. What a simple solution to something me and my users have complained about for years.


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