You are prompted for your workstation password if the CASA service is restarted and before you have set your master password.

Your desktop password and master password are used to encypt your secrets and store them on your computer. When you login to the computer, CASA will decrypt the saved secrets using your desktop password and make them available for applications integrated with CASA. If your desktop password changes, you must run CASA Manager and enter your master password before CASA can decrypt your saved secrets.

Important: To prevent unauthorized access to your credential stores, always create confidential passwords that are not easily discovered.