Hello,

this was the right hint.

Here is my script.

 Code:

$lokalDrive_G = "\\Server\Share"

For $Count = 65 To 90 Step 1 
	$L  = Chr ($Count)
	$LD = $L + ":"
	
	$LDR = "$$lokalDrive_" + $L
	$junk = execute ('$$LDRIVE="'+$LDR+'"')
	
	If $LDRIVE <> $LDR
		$Counter = 0
		DO
			$Counter = $Counter + 1
			If Exist ($LD) = 1
				Use $LD /Del 
				Use $LD $LDRIVE
            Else
				Use $LD $LDRIVE
            EndIf
        Until Exist($LD) = 1 or $Counter = 5
            
        If Exist ($LD) = 0
                        MessageBox ("ACHTUNG! Kein " + $L + "-Laufwerk vorhanden! Evtl. sind Sie nicht richtig am Netzwerk angemeldet.", "@TIME", 0)
                        $Error = $L + " "
        EndIf
	EndIf
Next


Thank you for all!!!

Regards
Michael