Hi Bunny,
There is so many material on the new SAP HCM features within EHP7. Here are some of them I've gathered for you:
First of all, I recommend you to enter to SAP Innovation Discovery Tool - http://www.sapsolutionbrowser.com/
It it you can filter to see the innovation of SAP HCM within EHP7.
- Business Function Overview: https://websmp102.sap-ag.de/~form/handler?_APP=00200682500000002672&_EVENT=DISPLAY&_SCENARIO=&_HIER_KEY=501100035870000016962&_HIER_KEY=601100035870000215177&_HIER_KEY=601100035870000240956&
- Release Notes: https://websmp210.sap-ag.de/~form/sapnet?_SHORTKEY=01100035870000762950&_SCENARIO=01100035870000000202
Regards,
Liran