Synchandler would do the same. Please post the snippet of what you trying to accomplish with a listener. Let me try.

Hi Please refer to the org.apache.jackrabbit.oak.security.authentication.ldap.impl.LdapIdentityProvider(http://grepcode.com/file/repo1.maven.org/maven2/org.apache.jackrabbit/oak-auth-ldap/0.17.1/org/apache/jackrabbit/oak/security/authentication/ldap/impl/LdapIdentityProvider.java) .  Over all though...

Please refer to http://jackrabbit.apache.org/oak/docs/security/authentication/ldap.html and http://jackrabbit.apache.org/oak/docs/security/authentication/externalloginmodule.html. Please let me know if this is not helpful.

You just need   <dependency>                <groupId>com.adobe.aem</groupId>                <artifactId>aem-api</artifactId>                <version>6.0.0.1</version>                <scope>provided</scope>            </dependency>

Did you try in other lower versions of IE?When you debug, till what point does it go? Does it go in to ajax functions and just hangs?

What do you mean by "never run that ajax". When you put break point in that line in developer console in IE, it doesnt break at that line? or it never makes a server call?

As I pointed out, 1000 node limitation is only in the case of ordered children  in OAK.If you dont need to maintain order, you can use nodetypes like oak:unstructured, which allows you to store a large number of children. Also for your usecases of 300K users, oak handles it.

OAK should be able to manage 300K users . By default, it will create 300K users in 64 sub trees. So it wil be some 5000 users in a folder.for ex.,(/home/users/(A-Z,a-z) etc.,This 1000 node limitation is only if the parent node can have only ordered child nodes. This is irrespective of tarmk or mongo...

This will result in single point failure. If your apache server goes down(though chances are less), the entire site goes down and hence not recommended. you need atleast one more apache server  when you have more than one publish server. The typical recommendation is 1:1. Please refer to https://cqd...

It is not possible to do this. Please let me know what features specifically you are looking for.