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Event ID: 8257 Source: mapsvc

Failed to create simple maps for users for the map definition AD-DOMAIN - nis-domain since the nt users could not be loaded.
In my case, this error appeared after I installed Windows Services for Unix 3.0 without first installing the ADClient for NT 4. After re-reading the install.htm file, I installed ADclient for NT 4, restarted the DC, and the error stopped.

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