function Set-ADServerUsage
{
    <#
            .SYNOPSIS
          Set all Active Directory related commands to use a special kind of server

            .DESCRIPTION
          By default the Active Directory related commands search for a DC. By default I want to make
          use of the closest one. When I make BULK operations, I would like to use the Server with
          the PDC role. This becomes handy often!

            .PARAMETER pdc
          Use the Active Directory Server who holds the PDC role.

            .EXAMPLE
          # Use the closest Server
          PS> Set-ADServerUsage

            .EXAMPLE
          # Use the Server with the PDC role
          PS> Set-ADServerUsage -pdc

            .EXAMPLE
          # When it comes to scripts that do bulk operations, especially bulk loads and manipulation,
          # I use the following within the Script:
          if (Get-Command Set-ADServerUsage -ErrorAction SilentlyContinue)
          {
          Set-ADServerUsage -pdc
          }

            .NOTES
          I use this helper function in my PROFILE. Therefore, some things a bit special.
          Who want's an error message every time a window opens under normal circumstances?

          Author: Joerg Hochwald - http://jhochwald.com
          This script is public domain!
  #>

	param
	(
		[Parameter(ValueFromPipeline = $true,
					  ValueFromPipelineByPropertyName = $true,
					  Position = 1)]
		[switch]
		$pdc
	)

	begin
	{
		# Defaults
		$SC = 'SilentlyContinue'

		# Cleanup
		$dc = $null
	}

	process
	{
        <#
              The following would do the trick:
              #requires -Modules ActiveDirectory
              But I don't want any error messages, so I decided to use this old-school way to figure
              out if we are capable do what I want.
      #>
		if ((Get-Command Get-ADDomain -ErrorAction $SC) -and (Get-Command Get-ADDomainController -ErrorAction $SC))
		{
			if ($pdc)
			{
				# Use the PDC instead
				$dc = ((Get-ADDomain -ErrorAction $SC -WarningAction $SC).PDCEmulator)
			}
			else
			{
				# Use the closest DC
				$dc = (Get-ADDomainController -Discover -NextClosestSite -ErrorAction $SC -WarningAction $SC)
			}

			# Skip everything if we do NOT have the proper information.

            <#
                  Under normal circumstances this is pretty useless, but I use some virtual machines
                  that have the RSAT tools installed, but they are not domain joined. The fore I make
                  this check. If all the systems that have the RSAT installed are domain joined, this
                  test is obsolete.
          #>
			if ($dc)
			{
				# Make use of the Server from above
				$PSDefaultParameterValues.add('*-AD*:Server', "$dc")
			}
		}
	}
}

# When it comes to scripts that do bulk operations, especially bulk loads and manipulation,
# I use the following within the Script:
if (Get-Command Set-ADServerUsage -ErrorAction SilentlyContinue)
{
    Set-ADServerUsage -pdc
}