Your licence lets you use any version of Confluence released before the end of the licence. If your licence is current, then 6.3 will cost you nothing. If it has expired, you may need to renew to get to the latest version.
So if you have a licence, the cost to upgrade is simply the time your admins and users will need to put into doing the work.
Do you use templates with Confluence? Take part in a remote 1-hr workshop. You'll receive USD $100 for your time! We're looking for people to participate in a remote 1-hr workshop...
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