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Configure Exchange 2007/2010 Preferred Domain Controller Settings

In some managed Exchange 2007 and 2010 environments, the preferred Domain Controller used by Exchange servers is different from the Domain Controller used by the Active Directory connector. As a result, the Active Directory replication latency can introduce mailbox creation failure. To prevent mailbox creation failure, configure the Exchange Server so that it communicates directly with the Active Directory connector-preferred Domain Controller.

To resolve the issue, set the ADS_E2K_SEND_DC system environment variable on the IM_CCS computer to 1.

Note: By default the value of the ADS_E2K_SEND_DC system environment variable value is 0.