Final answer:
To secure primary balancing segment values in a General Ledger, use Data Access Sets with an Access Set Type of Primary Balancing Segment and Segment Value Security, which allow you to manage access levels and restrict user entries for specific segments in a chart of accounts.
Step-by-step explanation:
To secure primary balancing segment values and ensure that employees of one company cannot enter or view data of another company in a General Ledger, the two security features you should use are Data Access Sets with an Access Set Type of Primary Balancing Segment and Segment Value Security.
Data Access Sets allow you to specify the access level to ledgers, balancing segment values, management segment values, and other segment values. Segment Value Security restricts the values a user can enter for a particular segment within a chart of accounts. By utilizing both features, you can effectively enforce security at the balancing segment level for General Ledger balances and reporting.