Increase Attachment size in MS CRM 4.0

By default, MS CRM 4.0 file attachment size is 5 MB.
Below are the steps to increase the default size to 10 MB.

1. Open the web.config of MS CRM

2. Locate httpRuntime the key within the element and change the values to the following: httpRuntime executionTimeout = "9999"
maxRequestLength = "10240"

3. Locate httpRuntime the key within the element of the element, and change it to the following: httpRuntime maxRequestLength = "10240"

save the web.config and restart IIS.