Exchange 2013 Mailbox Role Installation Error

Hi All,

I am getting the below error when installing Exchange 2013 Mailbox Role. This is a Windows Server 2012. Previous Exchange 2013 setup was removed since it had issues with CAS. Now we have removed all previous Exchange software and attributes.

Error:
The following error was generated when "$error.Clear();
          Install-ExchangeCertificate -services IIS -DomainController $RoleDomainController
          if ($RoleIsDatacenter -ne $true -And $RoleIsPartnerHosted -ne $true)
          {
            Install-AuthCertificate -DomainController $RoleDomainController
          }
        " was run: "Microsoft.Exchange.Management.Metabase.IISGeneralCOMException: An IIS directory entry couldn't be created. The error message is The system cannot find the path specified.
. HResult = -2147024893 ---> System.Runtime.InteropServices.COMException: The system cannot find the path specified.

   at System.DirectoryServices.DirectoryEntry
   at System.DirectoryServices.DirectoryEntry.Bind()
   at System.DirectoryServices.DirectoryEntry.RefreshCache()
   at System.DirectoryServices.DirectoryEntry.FillCache(String propertyName)
   at System.DirectoryServices.PropertyCollection.KeysCollection.GetEnumerator()
   at Microsoft.Exchange.Management.Metabase.IisUtility.GetProperties(DirectoryEntry webObj)
   --- End of inner exception stack trace ---
   at Microsoft.Exchange.Management.Metabase.IisUtility.GetProperties(DirectoryEntry webObj)
   at Microsoft.Exchange.Management.Metabase.IisUtility.GetWebSiteSslCertificate(String webObjectPath)
   at Microsoft.Exchange.Management.SystemConfigurationTasks.InstallExchangeCertificate.FindIisCertificate()
   at Microsoft.Exchange.Management.SystemConfigurationTasks.InstallExchangeCertificate.InternalProcessRecord()
   at Microsoft.Exchange.Configuration.Tasks.Task.<ProcessRecord>b__b()
   at Microsoft.Exchange.Configuration.Tasks.Task.InvokeRetryableFunc(String funcName, Action func, Boolean terminatePipelineIfFailed)".

Any views on this is appreciated.

Regards

Boniface

Senior Systems Administrator