So why not just fix the "other" drive to an unused mapping? "R:" or something?

If you really want to go down the random drive mapping route, do it this way:
  • Assign all possible letters to a variable.
  • Use the left-most letter to map the drive
  • Strip the letter that you have just used off the string so that it won't be used for the next mapping


Here is a simple example of how to do it (untested). Drive mappings will be assigned to drives Q:, R:, S: and T: in the order that they appear in the script. If you should run out of letters, the mapping will be assigned to the first unused drive letter:
Code:
Dim $sDrives

 

$sDrives="Q:R:S:T:"

 

If InGroup("group a")

	MapDrive(Left($sDrives,2),"\\some\share")

	$sDrives=SubStr($sDrives,3)

EndIf

 

If InGroup("group b")

	MapDrive(Left($sDrives,2),"\\some\other share")

	$sDrives=SubStr($sDrives,3)

EndIf

 



Function MapDrive($sDriveLetter,$sSharePath)

	If $sDriveLetter

		; Delete existing mapping

		Use $sDriveLetter /delete /persistent

		; *** Add error checking here ***

	Else

		$sDriveLetter="*" ; No drive letter - select one at random

	EndIf

	; Create new mapping

	Use $sDriveLetter $sSharePath

	; *** Add error checking here ***

EndFunction