The Active Directory Connector (ADC) replicates and synchronizes the Exchange Server 5.5 directory with Active Directory. By default, the ADC replicates all Exchange 5.5 directory attributes to Active Directory.
In some cases, however, you might want to prevent an attribute from replicating. For example, if your company recently merged with another company and your employee numbers changed, you might not want to replicate the Exchange 5.5 Employee Number directory attribute to Active Directory.
To prevent Exchange 5.5 directory attributes from replicating to Active Directory, follow these steps:
Be very careful when disabling attribute replication. Some attributes require replication in order for the ADC to function properly. If you're in doubt about the necessity of a particular property, contact Microsoft Product Support Services.