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SQL Express has stopped working after promoting the server to a DC

Posted on 2010-04-05
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Last Modified: 2012-05-09
Experts!

We have a server running Server 2008 Standard,  It is running an instance of SQL Express, which has a small 500MB database for a CRM application.  We promoted the server to a DC temporarily to get a full time replacement in place during a migration.  Now we are having trouble accessing the CRM (non-critical), and its spitting an error no matter what we try:

an error occurred in method UseLogin. PopulateDatabaseList: A network related or instance specific error occurred while establishing a connection to SQL server. The server was not found or accessible. Verify that instance name is correct and that SQL server is configured to allow remote connections

We have tried running the app from 3 different machines, and on the server itself, and still the same error.  What do we do?

Thanks!
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Question by:paylessoffice
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Qlemo earned 2000 total points
ID: 29798606
Go into the service applet and reapply the service credentials. Then restart the MSSQL services. If you do not have a SPN issue,  this helps.
If you have a SPN issue, you need to issue an setspn. SPN is Server Principal Name, a registration of the MSSQL service in AD.
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by:paylessoffice
ID: 29803720
How do I reapply the service credentials?
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by:Qlemo
ID: 29805299
Go into the Services applet, open the individual service properties (at least for the MSSQL Server instance), and change the login info forth and back.
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Author Comment

by:paylessoffice
ID: 29907389
Thanks!  We got it, it was the service account credentials.  After I reset them, it worked...
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