Cannot upload large files to WSS3.0 running on IIS7?

July 24th, 2010

This is an issue a lot of people have been seeing recently – Unfortunately, due to the massive number of different Apps which sit atop IIS, it can manifest itself in a huge variety of ways. You might see the error through Windows Sharepoint like this;

Error message when you try to upload a large file to a document library on a Windows SharePoint Services 3.0 site: “Request timed out”

Or you might see the error through Team Foundation Server, like this:

Microsoft Visual Studio
Attachment upload failed. Check that you have a network connection and that the Team Foundation Server is available. If the problem persists, contact your Team Foundation Server administrator.

Or any other number of errors from various applications.

The problem lies with IIS7′s maxAllowedContentLength. This is by default set to a value of 30000000 bytes (~28.6 MB)

The fix the issue, make the following change to your web.config file

<requestLimits maxAllowedContentLength=”2000000000″/>

You can change the value of ’2000000000′ to be whatever you want.

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