When adding a host connection to VMware vCenter, you might receive the following error:
"Cannot connect to the vCenter server due to a certificate error. Make sure that the appropriate certificates are installed on the vCenter server, and install the appropriate certificates on the following machines: <List of Desktop Delivery Controllers>"

Error Id: XDDS:6C711A03

Exception:

   Citrix.Console.Models.Exceptions.ScriptException The service instance is already registered with the Configuration Service.
        Citrix.Console.PowerShellInteraction.CmdletExecutionMethods.CreateException[T](ICommonLog logger, ExecutionResults`1 results, ICmdletExecutionHost host)
        Citrix.Console.PowerShellInteraction.CmdletExecutionMethods.ExecuteAndReturnRawResults(SdkPipeline sdkCmd, ICmdletExecutionHost host)
        Citrix.Console.PowerShellInteraction.CmdletExecutionMethods.Execute(SdkPipeline sdkCmd, ICmdletExecutionHost host)
        Citrix.Console.PowerShellInteraction.SdkServiceBase.RegisterService(ICmdletExecutionHost cmdletExecutionHost, String controllerToRegister, String configServiceAddress, Boolean checkDependency)
        Citrix.Console.PowerShellSdk.SiteService.Scripts.ConfigureServicesScript.RegisterAndResetCoreServiceInstances()
        Citrix.Console.PowerShellSdk.SiteService.Scripts.ConfigureServicesScript.RunScript()
        Citrix.Console.PowerShellInteraction.PowerShellScript`1.Run()
        Citrix.Console.PowerShellSdk.SiteService.Scripts.CreateEmptySiteScript.RunScript()
        Citrix.Console.PowerShellInteraction.PowerShellScript`1.Run()
        Citrix.Console.PowerShellSdk.SiteService.Scripts.FullDeploymentScript.RunScript()
        Citrix.Console.PowerShellInteraction.PowerShellScript`1.Run()
        Citrix.Console.DeliveryCenter.UI.Dialogs.FullDesktopDeploymentWizardViewModel.Commit(IProgressReporter progressReporter)
        Citrix.Console.CommonControls.Wizard.CommitProgressViewModel.<>c__DisplayClass1.<SetCommitOperation>b__0(IProgressReporter progressReporter, Canceller canceller)
        Citrix.Console.CommonControls.Wizard.CommitProgressViewModel.PerformOperationInternal()
   
    DesktopStudio_ErrorId : ServiceAlreadyRegistered
    ErrorCategory : NotSpecified
    DesktopStudio_PowerShellHistory : Full Desktop Deployment

To resolve this issue add the VMware vCenter server certificate to listed Desktop Delivery Controllers.

For more information refer to Citrix Documentation - Prepare the virtualization environment: VMware.

Problem Cause

The VMware vCenter server certificate not present on listed Desktop Delivery Controllers.