understood , Can you tell me what's the requirement suppose If I suggest to my client EV is best solution for archiving .Definitely he will raise the question .How I am going to implement what;s the requirement and alll.
As noted before, there is too little information to assist.
If you need to read up, you can start here: http://www.symantec.com/docs/DOC6282
Check the introduction and planning, and the installing and configuring guides. they give an initial start. Pleas involve a Partner for assistance. EV is NOT an 'off the shelf" product. You need to know what you are doing, otherwise you are guarenteed to run into problems later.