How to Change the Weblogic Administrator Password
https://knowledgebase.progress.com/articles/Article/ChangingWeblogicAdminPassword
Sep 13, 2015 . Change the password by clicking "Security Realms" under "Domain Structure" on the left panel, then click the realm name, then under "Setting for <realm> click "Users and Groups", then the user "system" , then click the tab "Passwords". Enter the desired password. 6. After successfully changing the password log out. 7. Shutdown the admin server.
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