Changes from the CLI - yes.
Changes from the CCMAdmin web portal - not really.
You can piece together certain things by using the tomcat logs and other trace files but it would be a very time consuming task that would produce very little information. Even with said information, you would have to infer quite a bit.
In 7.1(2) and later, Cisco has introduced a better auditing mechanism. I did a write up on it here:
http://www.netcraftsmen.net/resources/blogs/audit-logs-on-cucm.html
Not immediately helpful I know, but maybe something to ponder.
HTH.
Regards,
Bill
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