In the EPX file <EPX>/bin/config.properties, at the end of the TaskManager/Report Tools Properties section, there is a property called servlets.portal.isAutoLogin.
If the value of this property is set to false, then the login page of Portlet TaskManager is automatically displayed as the first page anytime Portlet TaskManager is accessed.
If the value of this property is set to true, then the login behavior can be described as follows:
If the short URL (no username or password) is used, then an error box with the message “Invalid password or unknown user name supplied” is displayed. After clicking the OK button, the login page of the portlet version of TaskManager is displayed.
If the long URL (with username and password) is used, and the username and password are valid, then the login page is skipped, and the user’s Inbox is displayed.
If, however, either the username or the password in the URL is invalid, then an error box with the message “Invalid password or unknown user name supplied” is displayed. After clicking the OK button, the login page of the portlet version of TaskManager is displayed.