On my laptop I have 2 VM:
1. Widows Server 2008 / SharePoint 2010 / local somedomainX
2. Windows Server 2012 / SharePoint 2013 / company somedomainY
Those servers are single farm servers for development and demo for the clients. The problem with SP 2013 is that when there is no Internet, I cannot connect to the external somedomainY, which is inconvenient.
The question is what can I do to connect my SP 2013 to the somedomainX?