One example involves a method for providing communications services to remotely-situated client entities, wherein each client entity is associated with users and each user is associated with a communication device. For providing the services verification may be realized by using a first authentication factor for a user among the users, and a communication request may be generated. The generated communication request may include a first portion specifying at least one target endpoint associated with the user and a second portion associated with or indicating the security code and that includes a set of instructions which: are specific to the user, which specify how to communicate the security code for the user, and which specify different security codes for different types of communications. The security code is sent to the user according to the set of instructions, and verified via a second authentication factor associated with or for the user by comparing input from the user to the security code.