The below steps can be performed to change the password for the user configured for VCS Java Console:
1) Open an elevated command prompt (Launch using Run as administrator)
2) Make sure the cluster configuration is in Read-Write mode by using the command below:
haconf -makerw
3) The user password can now be changed with the hauser command:
hauser -update
After running the above command, a prompt will request that the new password be entered and confirmed.
Below is an example of changing the password of the user: admin

Note: If it reports an error: V-16-1-11356 when setting the password, then run the command vcsencrypt -gensecinfo and provide a passphrase when prompted.

4) Once the password has been changed, save and close the cluster configuration with the following command
haconf -dump -makero
NOTE: The above steps are not applicable when using SSO. It will report the below error
VCS WARNING V-16-1-10603 Unknown option: -update
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To reconfigure SSO, run the Veritas Cluster Configuration Wizard (VCW) -> Edit Existing Cluster -> Reconfigure -> Configure/Reconfigure Single Sign-On
For more information on troubleshooting Single Sign-On user login issues, refer Steps to configure Veritas InfoScale cluster to use local credentials instead of Single Sign-On provided by VCS Authentication Service
For Veritas Cluster Server (VCS) on Windows, when using local credentials instead of Single Sign-on (SSO) for VCS Java Console, the password might be unavailable and need to be reset/changed.