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Difference between revisions of "Microsoft KB Archive/171050"

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Latest revision as of 10:05, 21 July 2020

Knowledge Base

Event ID: 1005 "Name service is unavailable" is logged

Article ID: 171050

Article Last Modified on 10/28/2006


  • Microsoft Exchange Server 5.0 Standard Edition
  • Microsoft Exchange Server 5.5 Standard Edition

This article was previously published under Q171050


The Exchange Server system attendant service (SA) may become unstable, stop when you attempt to use the Exchange Administrator program, or produce one of the following error messages when you try to start it:

Event ID 1005, Source: MSExchangeSA, Unexpected error.
Name service is unavailable. Microsoft Windows NT ID No 0xc00206e2 occurred.

Event log. Error 121, Microsoft system attendant (SA) failed to start.


This problem may be caused by incorrect configuration of the network service RPC Configuration.


To resolve this problem in Microsoft Windows NT 4.0, follow these steps:

  1. Go to Control Panel / Network and click the Services tab.
  2. Select the RPC Configuration service and click Properties.
  3. Confirm that the Name Service Provider box has Windows NT Locator and not DEC cell Directory Service.
  4. Click OK and restart the Exchange Server computer.

To resolve this problem in Microsoft Windows 2000 Server, follow these steps:

  1. Right-click My Network Places, and then click Properties.
  2. Right-click the network adapter, and then click Properties.
  3. Click Client for Microsoft Networks, and then click Properties.
  4. In the Name service provider box, click Windows Locator, and then click OK twice.
  5. Restart the Windows computer.

Keywords: kbprb kbusage KB171050