Time-out occurs when you import large customization files into Microsoft Dynamics CRM

Open CRM Web site from IIS Server.

Right-click the Web.config file, click Open With, and then click Notepad.

Go to the below line

Change it to maxRequestLength=”20000”

Change executionTimeout="3600"

This is has worked for me.


Important: After completing the action that requires the above changes to the web.config file, these parameters should be reset to their default values.