Check out these FAQ's on the subject.

http://www.nowsoftware.com/customercenter/supportNow/ViewFAQ.aspx?id=1173
http://www.nowsoftware.com/customercenter/supportNow/ViewFAQ.aspx?id=1172

If you have further questions, open a support ticket for assistance.
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Rachel Yoder
Now Software - Tech Support
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