A Workspace ONE UEM sandbox is a standard UEM tenant in a VMware Shared SaaS environment. The environment is managed by VMware Cloud Operations, not TestDrive.
To initially access the sandbox tenant in Shared SaaS, TestDrive provides a basic administrator account. The account is not managed by TestDrive. If you need to reset a basic admin account's password, please use the environment's "trouble logging in" feature.
If the environment's built-in password reset feature presents an error or if you can't recall your password reset answers, contact support.