New-VIPermission fails because AD has too many objects

I am trying to use vSphere PowerCLI to create new permissions in my vCenter.

I am running the following command

New-VIPermission -Entity (Get-Folder folder1) -Role (Get-VIRole PowerMan) -Principal "Domain\GroupName"

I get the Following result

New-VIPermission : 4/29/2013 4:45:28 PM    New-VIPermission        Could not fi
nd VIAccount with name 'Domain\GroupName'.
At line:1 char:17
+ New-VIPermission <<<<  -Entity (Get-Folder Cognosservers) -Role (Get-VIRole F
inancePowerMan) -Principal "Domain\GroupName"
    + CategoryInfo          : ObjectNotFound: (Domain\GroupName:Strin
   g) [New-VIPermission], VimException
    + FullyQualifiedErrorId : Core_ObnSelector_SelectObjectByNameCore_ObjectNo
   tFound,VMware.VimAutomation.ViCore.Cmdlets.Commands.PermissionManagement.N
  ewVIPermission

New-VIPermission : 4/29/2013 4:45:28 PM    New-VIPermission        Value cannot
be found for the mandatory parameter Principal
At line:1 char:17
+ New-VIPermission <<<<  -Entity (Get-Folder Cognosservers) -Role (Get-VIRole F
inancePowerMan) -Principal "Domain\GroupName"
    + CategoryInfo          : NotSpecified: (:) [New-VIPermission], VimExcepti
   on
    + FullyQualifiedErrorId : Core_BaseCmdlet_UnknownError,VMware.VimAutomatio
   n.ViCore.Cmdlets.Commands.PermissionManagement.NewVIPermission

I think it is because MY AD has more than 5000 Objects which is what the ADS.maxFetch setting in My vCenter is set to.  I can't even use get-viaccount -domain -group -name "Name" to return the AD Object i want to add.

Is there anyway to do this without changing the value of ADS.maxFetch.  My ad has 30,000 users and groups.