A. Increase the replication interval between sites，
B. Use SMTP as the transport protocol for replication.
C. Create site links to represent the physical topology.
D. Disable the Knowledge Consistency Checker （KCC） and manually configure site replication.

A. Import the user accounts as inetOrgPerson objects.
B. Import the user accounts into Active Directory by using the Ldifde command-line tool.
C. Export all user accounts from the UNIX servers to a text file.
D. Export all user accounts and their passwords from the UNIX servers to a text file. Encrypt this file to achieve extra security.
E. Assign random passwords to each user object， and securely distribute the password to the users.
F. Create the same strong password for each user object， and require users to change their passwords at first logon.
G. Instruct users to use the same name and password as they used on the UNIX servers.