Why do I have duplicate objects created after the Exchange mailbox migration? (NETIQKB18577)

goal
Why do I have duplicate objects created after the Exchange mailbox migration?

fact
Exchange Migrator 2.x

fix

If you are migrating with Exchange Migrator and you are using an ADC Connection Agreement (CA) then duplicate accounts/mailboxes will be created if you decide to turn ADC replication back on after the Exchange mailbox migration.  You will have the same results if you do not set the replication schedule of the ADC CA to "Never" during the migration.

Please review the following KB articles for ADC configuration requirements and viable workarounds:

• NETIQKB5660 : "What Active Directory Connector (ADC) Connection Agreements (CAs) are needed for a intra-org Exchange 5.5 to Exchange 2000 migration? "
• NETIQKB4448 : "How to: Configure an ADC CA LDAP filter?"
• NETIQKB17983 : "How to: Set a Custom Attribute for use with an LDAP filter?"

Formerly known as NETIQKB18577