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How to increase the Attachment File size in Sharepoint 2013 for Nintex Forms 2013


Increase the Upload size of the Attachment file to match the 250MB limit set by the latest CU for Sharepoint 2013



  • Modify the web.config file for the appropriate web application, this is located by default at C:\inetpub\wwwroot\wss\VirtualDirectories\web application name or port
    • Make a backup copy of the web.config, then open it
    • Do a Ctrl+f to find this element 
<httpRuntime maxRequestLength="51200" requestValidationMode="2.0" />
    • Modify the above element to match the following
<httpRuntime executionTimeout="999999" maxRequestLength="256000" requestValidationMode="2.0" /> 
    • In the above step we added executionTimeout="999999" and we set the maxRequestLength to what we set the maximum upload size on the web application general settings, which is 256000 (250mb * 1024 = 256000)


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Last update:
‎02-02-2021 10:37 PM
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