Dynamics NAV - The Specified Host Name is not valid

Solution:
Change default connection string on nav shortcut

• Navigate to C:\Users\<user>\AppData\Roaming\Microsoft\Microsoft Dynamics NAV\110
• Open ClientUserSettings in notepad
• Change the Server Name to the correct server name
• Look for     <add key="ClientServicesPort" value="7046"/>
• Change it to the port of the instance you are trying to connect to
• Look for      <add key="ServerInstance" value="DynamicsNAV71"/>
• Chnage it to the name of the instance you are trying to connect to