Upgrade 2013 RTM to CU1

I just upgraded Exchange RTM 2013 to CU1 and at stage 11 (client access) the install failed after about 90%.

The following error message was produced:

Exchange
Server component Mailbox role: Client Access service failed.

Error: Error:

The following error was generated when "$error.Clear();

         
update-WebServicesVirtualDirectoryVersion -DomainController
$RoleDomainController;

          $BEVdirIdentity =
$RoleNetBIOSName + "\EWS (Exchange Back End)";

          $be =
get-WebServicesVirtualDirectory -ShowMailboxVirtualDirectories -Identity
$BEVdirIdentity -DomainController $RoleDomainController -ErrorAction
SilentlyContinue;

          if ($be -eq $null)

          {

           
$BackEndPort=":444";

            $urlToUse =
"https://" + $RoleFqdnOrName + $BackEndPort +
"/ews/exchange.asmx";

           
new-WebServicesVirtualDirectory -Role Mailbox -WebSiteName "Exchange Back
End" -windowsAuthentication:$true -WSSecurityAuthentication:$true
-OAuthAuthentication:$false -BasicAuthentication:$false -InternalNLBBypassUrl
$urlToUse -DomainController $RoleDomainController -Force -GzipLevel High;

          }

          else

          {

            $be | set-WebServicesVirtualDirectory
-windowsAuthentication:$be.WindowsAuthentication
-WSSecurityAuthentication:$be.WSSecurityAuthentication
-OAuthAuthentication:$be.OAuthAuthentication
-BasicAuthentication:$be.BasicAuthentication

          }

          . "$RoleInstallPath\Scripts\Update-AppPoolManagedFrameworkVersion.ps1"
-AppPoolName:"MSExchangeServicesAppPool" -Version:"v4.0";

        " was run: "Cannot bind
argument to parameter 'WindowsAuthentication' because it is null.".<o:p></o:p>

Looks like $be.WindowsAuthentication was returned as blank. I would have been better to design it in such a way that if this is blank, simply replace the value with $true, instead of failing the whole setup.

In any case, I used remove-WebServicesVirtualDirectory on the EWS (Exchange Back End) which will actually force the code to re-create it, this lead to successfull upgrade.

Just as a fyi.