New Features in CUCM

The following documents are the good source of listing the new feature for each CUCM version.   It is often found as part of the release notes set of document.

CUCM Release Notes page can be found here.

http://www.cisco.com/c/en/us/support/unified-communications/unified-communications-manager-callmanager/products-release-notes-list.html

Search for "New and Changed"

Here are some examples of such documentation.

- New and Changed Document for Cisco Unified Communications Manager Release 7.1(1)
- New and Changed Information for Cisco Unified Communications Manager 8.0(x)
- New and Changed for Cisco Unified Communications Manager 8.5(1)
- New and Changed Information for Cisco Unified Communications Manager Release 8.6(2)
- New and Changed Information for Cisco Unified Communications Manager Release 8.6(1)
- New and Changed Information for Cisco Unified Communications Manager, Release 10.0(1)

I also found that the CUCM Features add Services Guide Documentation is a good documentation to find out the list of all features.  From there we can derive a set of new feature set.

List of all Features and Services Guide can be found from Manage and Operate Guides page.

http://www.cisco.com/c/en/us/support/unified-communications/unified-communications-manager-callmanager/products-maintenance-guides-list.html

Search for "Features and Services" on the page.