During the initial installation of the Enforce Server you enter a password for the System Account and you receive the message from the Setup:
"Password too long. For Pre-Windows 2000 compatibility, Windows user passwords can be a maximum of 14 characters. If your OS supports longer passwords, you may change to a longer password after installation if you wish."
You will need to enter a password up to the maximum limit of 14 characters during the Enforce Setup.
The password entered for the System Account does not have to be the same as the Oracle Database Protect account as the System Account does not interact with the Oracle Database it is used to run the DLP Vontu services on the Enforce Server.
For more installation steps please see your Installation Guide.