The Servlet engine is the server within which each of the AEM instances would be running as a web application. Here it could be any Servlet Engine that supports Servlet API 2.4 or higher. Although CQ WCM ( Web Content Management ) be run without the need for an additional Application Server, it would still require a Servlet Engine.
Fail to login AEM with the default user name and password. Cannot login AEM with the default user name and password. Cause: you may have changed the login username and password of the AEM when you installed Appeon Server. Solution: Use the username and password specified when you install Appeon Server.