If you are using a custom database for SAP Mobile Platform, you select and configure the database during installation. You can change the password after installation. Use caution when changing other database connection properties.
SAP Mobile Platform Server connection properties are located in <SMP_HOME>\Server\config_master\connection_data\connection.properties.
Mobiliser database connection properties are located in <SMP_HOME>\Server\config_master\com.sybase365.mobiliser.framework.persistence.jdbc.bonecp.pool\pool.properties.