Reset Weblogic Admin Password

Following steps to be performed to update Weblogic Admin Password.

- Login to Console

- Security Realm->MyRealm->Users And Groups->Username->Password- Modifiy the password.

- Domains ->Security->General->Advanced->Update Node Manager Password

- Shutdown the instance

- Go to Domain_Home/servers/Admin/Security/
  Update boot.properties with the updated password and user id.

- Update the boot.properties file present in all ManagedServerHome/Security.

- Start the Admin Server.

- Start the Managed Servers.

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In case if there are errors regarding authentication during the startup of Managed Servers,rename the existing ManagedServerHome/Data/ folder and re-try the activity.More details are present in this page: http://anoopbal.blogspot.com/2015/09/managed-server-startup-failed.html
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Managed Server Startup Failed

Managed server startup failed after an admin user password update.Logs in the server has below entries:

weblogic.security.SecurityInitializationException: Authentication denied: Boot identity not valid; The user name and/or password from the boot identity file (boot.properties) is not valid. The boot identity may have been changed since the boot identity file was created. Please edit and update the boot identity file with the proper values of username and password. The first time the updated boot identity file is used to start the server, these new values are encrypted.
        at weblogic.security.service.CommonSecurityServiceManagerDelegateImpl.doBootAuthorization(CommonSecurityServiceManagerDelegateImpl.java:960)
        at weblogic.security.service.CommonSecurityServiceManagerDelegateImpl.initialize(CommonSecurityServiceManagerDelegateImpl.java:1054)
        at weblogic.security.service.SecurityServiceManager.initialize(SecurityServiceManager.java:888)
        at weblogic.security.SecurityService.start(SecurityService.java:141)
        at weblogic.t3.srvr.SubsystemRequest.run(SubsystemRequest.java:64)
        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:263)
        at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)
Caused By: javax.security.auth.login.FailedLoginException: [Security:090304]Authentication Failed: User rmswladmin javax.security.auth.login.FailedLoginException: [Security:090302]Authentication Failed: User rmswladmin denied
        at weblogic.security.providers.authentication.LDAPAtnLoginModuleImpl.login(LDAPAtnLoginModuleImpl.java:261)
        at com.bea.common.security.internal.service.LoginModuleWrapper$1.run(LoginModuleWrapper.java:110)
        at java.security.AccessController.doPrivileged(Native Method)
        at com.bea.common.security.internal.service.LoginModuleWrapper.login(LoginModuleWrapper.java:106)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at javax.security.auth.login.LoginContext.invoke(LoginContext.java:762)
        at javax.security.auth.login.LoginContext.access$000(LoginContext.java:203)
        at javax.security.auth.login.LoginContext$4.run(LoginContext.java:690)
        at javax.security.auth.login.LoginContext$4.run(LoginContext.java:688)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.login.LoginContext.invokePriv(LoginContext.java:687)
        at javax.security.auth.login.LoginContext.login(LoginContext.java:595)



Solution for this issue is to perform the below:

- Backup the $MANAGED_SERVER_HOME/data/ldap
- Rename/Delete ldap folder.
- Update the $MANAGED_SERVER_HOM/security/boot.properties with password and user id.
- Startup the managed server.