I need to change the administrator as the person who set up confluence is no longer here. How to I give permissions to another person
You need to get an existing administrator to add your new admin to the administration group(s)
If you don't have an existing admin any more, then have a look through recovering a user/password: https://confluence.atlassian.com/doc/restore-passwords-to-recover-admin-user-rights-158390.html
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