Using postfix and ActiveDirectory

Quick reference for using postfix as a “shield” server to Exchange to check valid mailboxes against ActiveDirectory (SBS edition):
create a LDAP configuration file:

server_host = ad-server.your.domain
search_base = ou=MyBusiness,dc=your,dc=domain
query_filter = (&(objectClass=*) (proxyAddresses=smtp:%s))
result_attribute = sAMAccountName
bind_dn = dn of user account
bind_pw = pw of user

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