Event ID: 1003 occurs every 30 minutes after you install Microsoft Services for network file system on a Windows Server 2003 R2-based computer

Consider the following scenario. You install Microsoft Services for network file system (NFS) on a Microsoft Windows Server 2003 R2-based computer. However, the User Name Mapping component is not installed on the computer. In this scenario, you receive the following event in Event Viewer every 30 minutes even though a User Name Mapping server is running on the network:

Event Type: Warning
Event Source: NfsSvr
Event Category: None
Event ID: 1003
Date: Date
Time: Time
User: N/A
Computer: ComputerName
Description:
Mapping information could not be obtained from User Name Mapping. Another attempt will be made after 30 minutes.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

Note By default, the User Name Mapping component is not installed when you install Microsoft Services for NFS.

This issue occurs when you do not have the User Name Mapping component installed on the server that has Microsoft Services for NFS installed.

This issue occurs because the server that has Microsoft Services for NFS installed is configured to use Localhost as the User Name Mapping server after you install Microsoft Services for NFS.

To resolve this issue, modify the setting of Microsoft Services for NFS by using the Nfsadmin utility. To do this, run the following command at the command prompt:Note SERVER_NAME represents the name of the server that has the User Name Mapping service installed on the network. Additionally, SERVER_NAME can also represent the IP address of the User Name Mapping server. Notice that you do not include spaces between mapsvr and the equal sign (=) in this command.

This behavior is by design.

When you experience this issue, you can examine the setting of the User Name Mapping server by running the following command at the command prompt:The output may appear as follows: