For more information about how to create a database user or a SQL Server login, see This error occurs when credentials are passed across multiple computer connections.If you are using Windows Authentication, and the Kerberos version 5 protocol is not enabled, this error occurs when credentials are passed across more than one computer connection.The SQL Server Database Engine service is dependent on the Network Name resource.A failure of the Network Name will result in the SQL Server Resource not coming online.A common issue I've run into while helping with SQL Server Failover Cluster (FCI) installations is the failure of the Network Name.In the following post I'll discuss a bit of background, the common root cause, and how to resolve it.
you create a failover cluster and configure clustered services or applications, the failover cluster wizards create the necessary Active Directory computer accounts (also called computer objects) and give them specific permissions.
For more information about data source configuration and configuring report server connection information, see This is a generic error that occurs when the report server cannot open a connection to an external data source that provides data to a report.
This error appears with a second error message that indicates the underlying cause.
Use this topic to troubleshoot problems that you experience when connecting to a report server.
This topic also provides information about "Unexpected error" messages.
The wizards create a computer account for the cluster itself (this account is also called the cluster name object or CNO) and a computer account for most types of clustered services and applications” When the SQL Server Network Name is first brought online during the FCI installation process, the CNO identity is used to create the VCO(as long as the VCO doesn’t already exist).