MX record also used when the mail host name is not the same as the top-level domain. Exchange does not allow multiple recipient shares the same SMTP address within an organization. Changes to the Exchange Server dBase files are written to their respective transaction logs. Directory dBase and service are 2 components of Exchange directory. MTA Default MTA windows size is 5.
Checkpoint file indicates which data has been written from transaction logs to .edb files.
A Site Connector requires at least a 128Kpbs permanent reliable connection. IS will first attempt to connect to lowest. 0 is not allowed in Site connector IS will not attempt to connect to a site if it has no affinity number. By not point to an MsMail post office, MsMail messaging is disabling with that MsMail system only. Exchange uses RPC for client- server communication. This is the NT RPC end-point mapped service.