Exchange 2010 – Increase the maximum accepted content length

Howto increase the maximum accepted content length in Exchange Web Services.

1. Open Explorer
2. Navigate to C:\Program Files\Microsoft\Exchange Server\ClientAccess\exchweb\ews
3. Open the file Web.Config in with notepad
4. Go to the end of the file
5. Insert the following XML tags before the </configuration> tag, note that 104857600 indicates 100mb. <pre><system.webServer> <security> <requestFiltering> <requestLimits maxAllowedContentLength=”104857600” /> </requestFiltering> </security> </system.webServer>

</pre>

1. Restart IIS:
   <pre>iisreset</pre>