Microsoft (MSFT) announced Friday that it is adding two-factor authentication to its Azure cloud computing platform.

The company said its new service code, Active Authentication, will let Azure's corporate customers provide employees with secure access to applications such as its customer relationship management package, Dynamics CRM Online.

Active Authentication adds an extra step in the sign-in process, the company said, forcing a user to not only enter a username and password but also use a mobile app or send a text message.

"This helps prevent unauthorized access to data and applications in the cloud — reducing the risk of a breach and enabling regulatory compliance," Microsoft said in an email.

Banks have said repeatedly that security is their chief concern about using cloud computing.