Siddharth,
As always thank you for your response we did open an OSS request but today I found a note that solved our issue in case others come across this.
http://service.sap.com/sap/support/notes/1811575 ESS WDA: NWBC role menu is cached
NWBC menu is cached for ESS role and due to which enrollment reasons donot appear in ESS .
I applied the correction in this note and our issue is resolved.
Thanks,
Martha.