XFOR: Lotus Notes Directory Synchronization Allows Specification of Read Only Field for Selected Attributes (251049)

CAUSE

This issue can occur when you define an AMAP attribute for export to a remote system, because the process defines the attribute for export by default, and there is no corresponding mapping rule for import.

During import, the Exchange Server (Dxamex) and Lotus Notes (Dxanotes) processes compare the attribute import value (usually a null value, because there is no import mapping rule) against an internal system value (which is most likely not a null value). Because the two values are different, the Directory Exchange Agent (DXA) also tries to update the target entry, even if none of the attributes have been updated at the source, because some of the export-only attributes are included as part of the import. This behavior causes a severe performance hit, because a very full load causes every entry in the system to be refreshed.