Sitecore Experience Commerce 9 installation error: The target principal name is incorrect

Recently I have stumbled upon in a situation where Sitecore Experience Commerce 9 update 1 powershell installation script didn’t execute successfully and gave the following error:

Importing DACPAC C:\Sitecore\installscCommerce9u1\deploy\Sitecore.Commerce.Engine.SDK.2.1.10\Sitecore.Commerce.Engine.DB.dacpac
Using SQL Server 140 to import DACPAC
TerminatingError(DeployDacpac): "Exception calling "Deploy" with "3" argument(s): "Could not deploy package.""
Initializing deployment (Start)
The target principal name is incorrect.  Cannot generate SSPI context.
System.Management.Automation.MethodInvocationException: Exception calling "Deploy" with "3" argument(s): "Could not deploy package." ---> Microsoft.SqlServer.Dac.DacServicesException: Could not deploy package. ---> Microsoft.Data.Tools.Schema.Sql.Deployment.DeploymentFailedException: Unable to connect to master or target server 'SitecoreCommerce9_Global'. You must have a user with the same password in master or target server 'SitecoreCommerce9_Global'.
   at Microsoft.Data.Tools.Schema.Sql.Deployment.SqlDeploymentEndpointServer.OnInit(ErrorManager errors, String targetDBName)
   at Microsoft.Data.Tools.Schema.Sql.Deployment.SqlDeployment..ctor(SqlDeploymentConstructor constructor)
   at Microsoft.Data.Tools.Schema.Sql.Deployment.SqlDeploymentConstructor.ConstructServiceImplementation()
   at Microsoft.SqlServer.Dac.DacServices.CreatePackageToDatabaseDeployment(SqlConnectionFactory connectionFactory, IPackageSource packageSource, String targetDatabaseName, DacDeployOptions options, ErrorManager errorManager)
   at Microsoft.SqlServer.Dac.DeployOperation.<>c__DisplayClass3.<>c__DisplayClass5.<CreatePlanInitializationOperation>b__1()
   at Microsoft.Data.Tools.Schema.Sql.Dac.OperationLogger.Capture(Action action)
   at Microsoft.SqlServer.Dac.DeployOperation.<>c__DisplayClass3.<CreatePlanInitializationOperation>b__0(Object operation, CancellationToken token)
   at Microsoft.SqlServer.Dac.Operation.Microsoft.SqlServer.Dac.IOperation.Run(OperationContext context)
   at Microsoft.SqlServer.Dac.ReportMessageOperation.Microsoft.SqlServer.Dac.IOperation.Run(OperationContext context)
   at Microsoft.SqlServer.Dac.OperationExtension.CompositeOperation.Microsoft.SqlServer.Dac.IOperation.Run(OperationContext context)
   at Microsoft.SqlServer.Dac.OperationExtension.CompositeOperation.Microsoft.SqlServer.Dac.IOperation.Run(OperationContext context)
   at Microsoft.SqlServer.Dac.DeployOperation.Microsoft.SqlServer.Dac.IOperation.Run(OperationContext context)
   --- End of inner exception stack trace ---
   at Microsoft.SqlServer.Dac.DeployOperation.Microsoft.SqlServer.Dac.IOperation.Run(OperationContext context)
   at Microsoft.SqlServer.Dac.OperationExtension.Execute(IOperation operation, DacLoggingContext loggingContext, CancellationToken cancellationToken)
   at Microsoft.SqlServer.Dac.DacServices.InternalDeploy(IPackageSource packageSource, Boolean isDacpac, String targetDatabaseName, DacDeployOptions options, CancellationToken cancellationToken, DacLoggingContext loggingContext, Action`3 reportPlanOperation, Boolean executePlan)
   at Microsoft.SqlServer.Dac.DacServices.Deploy(DacPackage package, String targetDatabaseName, Boolean upgradeExisting, DacDeployOptions options, Nullable`1 cancellationToken)
   at CallSite.Target(Closure , CallSite , Object , Object , Object , Boolean )
   --- End of inner exception stack trace ---
   at System.Management.Automation.ExceptionHandlingOps.CheckActionPreference(FunctionContext funcContext, Exception exception)
   at System.Management.Automation.Interpreter.ActionCallInstruction`2.Run(InterpretedFrame frame)
   at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)
   at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)
   at System.Management.Automation.Interpreter.Interpreter.Run(InterpretedFrame frame)
   at System.Management.Automation.Interpreter.LightLambda.RunVoid1[T0](T0 arg0)
   at System.Management.Automation.PSScriptCmdlet.RunClause(Action`1 clause, Object dollarUnderbar, Object inputToProcess)
   at System.Management.Automation.PSScriptCmdlet.DoEndProcessing()
   at System.Management.Automation.CommandProcessorBase.Complete()
The target principal name is incorrect.  Cannot generate SSPI context.

I was able to resolve this issue by making below changes in powershell script (Deploy-Sitecore-Commerce.ps1)

• Set value as CommerceServicesDbServer = "." instead of CommerceServicesDbServer = "./"
• Set value as SitecoreDbServer = "." instead of SitecoreDbServer = "./"

You may have to update above DbServer values as per your SQL Server configuration. Comments and suggestions are most welcome. Happy coding!