2)How can you identify the users in webintelligence not
using the reports past few months. And delete them.


you can download a free application "lambda probe" which
helps you in getting the IPs of users logged on to BOXI. you
can do a lot more with this application like killing user
sessions etc. 

It also clearly gives you the list of users that are logged
on to CMC or Infoview.

3)	How can you move documents from one environment to 
other environment

A) You can move documents/reports/universes from one 
environment to other environment using Import Wizard.

2) The auditor in the BO repository XIR2 used to keep a log 
for every kind of event/action. So, for that particular 
webi report, if there's no information logged in the 
auditor table for a long time, then user can delete that 
report.