LDAP connectivity is a protocol and communication issue, not having to do with the OS that makes the connection, or the OS holds the server. Linux connections to Exchange happen all the time.

The same code in Config.pm works for Windows as well as Linux, as long as the perl LDAP module is installed.

Information retrieved from third parties (other DB, LDAP) does *not* sync to OTRS DB. It is queried.

AuthSync for Users (agents) is not demographic information, it's only about reducing authentication requests to the LDAP server.

Hope this helps!