Customize the domain of your network, and access your network-wide domain settings by going to Company > Customize Application > Settings > Domain.
This allows you to host your partner network on a custom domain. Example: affiliates.yourcompany.com
Before you update the custom application domain setting, you will need to update the DNS for the domain. Add the CNAME* to your TUNE subdomain for your application.
*Example CNAME for application domain: NETWORKID.hasoffers.com
After DNS has resolved for the custom application domain, then specify the custom application domain in your application. Specifying the custom application domain before the DNS resolves will prevent you from accessing your partner network until the DNS update resolves.