If so, you need SAP Universal ID. In a few months, SAP Universal ID will be the only option to login to SAP Community. Without it, you will lose your content and badges. If you have multiple accounts, use the Consolidation Tool to merge your content.
Presently i am working on XI. Simultaneously i would like to learn EP or BW. Please give a suggestion which one is best for me. And also tell me, where can I get training for EP/BW and certification details