Error when running this program for Dynamic CRM

I ran the Sample Code for Business Management and was prompted

I was prompted this:
Enter a CRM server name and port [crm.dynamics.com]:

Where can I find this info? Where can I find the port?

I typed in disco.crm.dynamics.com for North American and this is the error I received.

Enter a CRM server name and port [crm.dynamics.com]: disco.crm.dynamics.com
Is this organization provisioned in Microsoft Office 365 (y/n) [y]: y
The application terminated with an error.
Metadata contains a reference that cannot be resolved: 'https://disco.disco.crm.
dynamics.com/XRMServices/2011/Discovery.svc?wsdl&sdkversion=7.1'.
The remote name could not be resolved: 'disco.disco.crm.dynamics.com'
Press <Enter> to exit.

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Reference:
https://msdn.microsoft.com/en-us/library/gg334689.aspx