Yahoo! Messenger allows users to set their status to 'Invisible' so that other users are not informed that the user is online. A Yahoo! Instant Messenger user can determine if another user is online by requesting access to the user's shared files. The message returned by this request will contain information that reveals the user's true online status. Note, however, that the 'Invisible' user will receive a message asking whether to allow the requestor permission to access the file shares.
Yahoo! Messenger allows users to set their status to 'Invisible' so that other users are not informed that the user is online. A Yahoo! Instant Messenger user can determine if another user is online by requesting access to the user's shared files. The message returned by this request will contain information that reveals the user's true online status. Note, however, that the 'Invisible' user will receive a message asking whether to allow the requestor permission to access the file shares.