How do I change the server or organisation with MoCA?
Currently not supported. If you wish to change the server or organisation, then you will need to uninstall MoCA and reinstall it to get back to the Welcome screen where you can enter a different server or organisation address/URL.
This is a known issue by Microsoft as stated in this readme link below. So watch this space for this feature to be added.
http://www.microsoft.com/en-us/dynamics/crm-customer-center/readme.htm