Exchange 2010 SP3 fails on Client Access Role with Object reference not set to an instance of an object

Working with a client on SBS 2011 and found that previous vendor didn't install updates.  Trying to install Exch 2010 SP3 and errors out on WebServicesVirtualDirectory.  Any help appreciated.

Language Files
Completed

Elapsed Time: 00:07:24


Restoring services
Completed

Elapsed Time: 00:00:02


Languages
Completed

Elapsed Time: 00:03:20


Hub Transport Role
Completed

Elapsed Time: 00:04:53


Client Access Role
Failed

Error:
The following error was generated when "$error.Clear(); 
update-WebServicesVirtualDirectoryVersion -DomainController $RoleDomainController;
$urlToUse = "https://" + $RoleFqdnOrName + "/ews/exchange.asmx";
$existingVDirs = get-WebServicesVirtualDirectory -Server $RoleFqdnOrName -DomainController $RoleDomainController;
if ($existingVDirs -ne $null)
{
if ($RoleIsDatacenter -eq $true)
{
$existingVDirs | set-webservicesvirtualdirectory -InternalNLBBypassUrl $urlToUse -WindowsAuthentication $true -WSSecurityAuthentication:$true -DomainController $RoleDomainController -UpdateManagementVirtualDirectory -CertificateAuthentication $true -Force -GzipLevel High;
}
else
{
$existingVDirs | set-webservicesvirtualdirectory -InternalNLBBypassUrl $urlToUse -WindowsAuthentication $true -WSSecurityAuthentication:$true -DomainController $RoleDomainController -CertificateAuthentication $true -Force -GzipLevel High;
}
}
else
{
new-WebServicesVirtualDirectory -windowsAuthentication:$true -WSSecurityAuthentication:$true -InternalNLBBypassUrl $urlToUse -DomainController $RoleDomainController -Force -GzipLevel High;
}
" was run: "Object reference not set to an instance of an object.".

Object reference not set to an instance of an object.