When your Microsoft Exchange 2000 Server organization includes connections to previous
versions of Exchange and Microsoft Windows NT, you need to consider
a variety of factors. You need to be familiar with how to
administer your Exchange organization in mixed mode. In addition,
you need to consider the management of Connection
Agreements with servers that are not running Exchange
2000 using Active
Directory Connector (ADC).
Another factor you will need to consider is the clean up of
duplicate accounts in Active
Directory, which can occur as a result of multiple
directories being migrated or upgraded into Active Directory. These
scenarios can include upgrading to Windows 2000, upgrading to
Exchange 2000, using third-party mail connectors, and migrating
from third-party e-mail systems.
You can operate your Exchange 2000 organization in mixed mode or
native mode. Native mode offers full Exchange 2000 functionality,
while mixed mode offers interoperability between Exchange 2000 and
previous versions of Exchange. When you install Exchange 2000 your
Exchange 2000 organization is in mixed mode by default.
This default setting ensures future interoperability with
previous versions of Exchange (for example, if you install a server
running Exchange 5.5 at a later time), even if no Exchange
5.x servers exist at the time of installation. The concept
of mixed mode and native mode in Exchange organizations is similar
to the idea of mixed mode and native mode domains in Active
Directory. For Exchange 2000, native mode and mixed mode can be
selected only at an organizational level. More...
You can manage users with mailboxes on
Exchange 4.x and 5.x servers from Exchange Server
Administrator or from Windows 2000 Active Directory Users and
Computers. There are advantages to using Active Directory Users and
Computers. More...
Although the configuration of an Exchange 5.5
organization is synchronized with Active Directory using a
Configuration Connection Agreement, you must
administer all 4.x and 5.x servers using Exchange
Server Administrator. More...
Multiple objects can be created when multiple
directories are migrated or upgraded into Active Directory. Active
Directory Account Cleanup Wizard is a utility designed to merge
duplicate objects into one account.
When duplicate accounts are merged into a selected destination
account, Windows NT access and group and Distribution List
memberships are preserved. In addition, the integrity of all other
available attributes is maintained. More...