Configure WebEx Enterprise in OneLogin
If you haven't already added WebEx Enterprise to your OneLogin account, you can do it via this link:https://app.onelogin.com/apps/new/3036
Now, configure the application.
- Choose SAML as authentication method
 - Enter your subdomain, e.g. mycompany
 - Select the roles you want to have access to WebEx
 - Save the app
 
Configure SAML in WebEx
- Sign into your WebEx Enterprise account as the admin
 - Click Site Administration in the menu bar
 - Click SSO Configuration in the sidebar
 - You should now see the page below

 - Set WebEx SAML Issuer to "http://www.webex.com"
 - Set Issuer for SAML to the SAML Issuer from the WebEx app in OneLogin
 - Set Customer SSO Service Login URL to the SAML Login URL from the WebEx app in OneLogin
 - Set AuthContextClassRef to "urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport"
 
More Here
Courtesy:http://support.onelogin.com/entries/362606-configuring-webex-for-saml-with-onelogin