The administrator has added the company IP address ranges to the network acess section, What will happen when a user tries to log in from outside the company network?

Network access restrictions generally trigger identity verification for logins outside trusted IPs, rather than outright denying API login attempts by default.

Salesforce's Network Access feature, which uses trusted IP ranges, requires users logging in from outside these specified ranges to verify their identity, typically through a verification code sent to their registered email or phone.

Salesforce does not automatically redirect users to a VPN when they log in from outside a trusted IP range; it enforces identity verification instead.

Login attempts are not automatically denied; instead, Salesforce triggers an identity verification challenge for logins originating from outside trusted IP ranges.