Hi
For the cucm admin page access issue the solution is to create and install a trusted SSL certificate so that users who access https://<node>/ccmuser do not receive a certificate error.
But in case of Sandbox On a running reservation select the device and then on the right hand side of the screen click 'Show Attributes' to see the details and try.
Reference - https://communities.cisco.com/message/157606
Thanks and Regards,
Geevarghese