Online (Online mode)—An ESA component is in online mode if it can contact the Authentication Server via TCP/IP connection.
Offline (Offline mode)—An ESA component is in offline mode if it cannot contact the Authentication Server via TCP/IP connection.
OS—Operating System.
OTP—an one time password, either with limited time validity (time-based OTP) or without limited time validity (event-based OTP).
OWA—Outlook Web Access
Mobile Application Push—push notification with limited time validity
RDP—Remote Desktop Protocol. A proprietary protocol developed by Microsoft which provides a user with a graphical interface to connect to another computer over a network connection.