1. Reach licensing@cisco.com for the rehost
2. You point to LDAP, not the other way around and if you're not using DNS, you don't need to change anything
3. VMports register using the name, just make sure they re-register
Anything else you have configured for the static IP in your CUCM config, will need to be updated to the new one.
HTH
java
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www.cisco.com/go/pdihelpdesk
HTH
java
if this helps, please rate