The entire Exchange directory environment is based on the X.500 protocol. The protocol is based on the old X.500 protocol. The protocol used to connect to the directory service of every program that Supports directory access. The main difference is that X.500 focuses on how objects are represented while LDAP focuses on how to access the directory objects. Even if we do want to see the mail, it will be downloaded into our RAM and deleted afterwards.
All processing remains on the server.
A server may send out a SAP every 60 seconds to inform other network devices about the services it offers. Workstations use SAPs to find services they need on the network. Once we have established a user in one container, it will permanently stay there until we'll erase it. There is no way to move a user once created in a folder. The servers MUST belong to the same site.