At the time of creating agents i have 20 receipents. After some days 5 receipents added. now my query is how to add extra receipent to agent.is it nessary to create receipent(user) in db and add recipents to the group can any one suggest me.
Only if you want to send them personalized content (i.e. the queries automatically get filtered for the recipient in question).
You can add that manually in ibot if you want , by giving there email id's
After add receipient option you can find another button to add users by email id