ERROR: [7111] E20838: Failed to add SID history for userid to userid rc=1747 The authentication ser (NETIQKB29815)

fact
Domain Migration Administrator 7.x

symptom
ERROR: [7111] E20838: Failed to add SID history for userid to userid  rc=1747 The authentication service is unknown.

cause

There are a couple of services that can cause this error.

1. This error can be caused if the Remote Procedure Call (RPC) Locator service is not started on the source primary domain controller.
   
2. This error can also be caused if the NT LM Security Support Provider service is disabled or not present on the source primary domain controller. It is normally set to Manual and not started. DMA will start this service for the agent process. If the service is not present, or if the startup type is 'Disabled' then DMA will return an error stating 'The authentication service is unknown'.

fix

The 'Remote Procedure Call (RPC) Locator' and 'NT LM Security Support Provider' services will not be present if the 'RPC Configuration' service has not been installed. 

To install this on a Windows NT 4 server:

1. Right-click Network Neighborhood.
   
2. Select Properties.
   
3. Select Services.
   
4. Click Add. 
   
5. Select and add the RPC Configuration service.
   
6. Reboot the machine.
   
7. Start the Remote Procedure Call (RPC) Locator service.
   
8. The NT LM Security Support Provider service can be left stopped, but not disabled. 
   
9. Migrate the account again.

Formerly known as NETIQKB29815