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Hello. I have 5 DCs, and I need to create a scheduled task to run a script that will test the authentication time for each one of them, once every minute. (Then I'll use it within a log analyser to create graphics). I came up with a script using the great AD UDF (by water). First I tried using "for" and an array, but something was messing up the results, then I went for the dumb old fashioned way: #Include <ad.au3> #include <MsgBoxConstants.au3> Global $AdTestTime = "" Global $Timer1, $Timer2, $Timer3, $Timer4, $Timer5 = "" Global $sAD1 = "MYSERVER109" Global $sAD2 = "MYSERVER110" Global $sAD3 = "MYSERVER111" Global $sAD4 = "MYSERVER112" Global $sAD5 = "MYSERVER113" $Timer1 = Timerinit() _AD_Open("", "", $sAD1) _AD_Close() Local $fDiff1 = TimerDiff($Timer1) $Timer2 = Timerinit() _AD_Open("", "", $sAD2) _AD_Close() Local $fDiff2 = TimerDiff($Timer2) $Timer3 = Timerinit() _AD_Open("", "", $sAD3) _AD_Close() Local $fDiff3 = TimerDiff($Timer3) $Timer4 = Timerinit() _AD_Open("", "", $sAD4) _AD_Close() Local $fDiff4 = TimerDiff($Timer4) $Timer5 = Timerinit() _AD_Open("", "", $sAD5) _AD_Close() Local $fDiff5 = TimerDiff($Timer5) MsgBox(0,"", "MYSERVER109=" & $fDiff1) MsgBox(0,"", "MYSERVER110=" & $fDiff2) MsgBox(0,"", "MYSERVER111=" & $fDiff3) MsgBox(0,"", "MYSERVER112=" & $fDiff4) MsgBox(0,"", "MYSERVER113=" & $fDiff5) Still, something is off here. The first AD to be tested is always the slowest one, by far, like 20 times slower. Then I started to suspect that the first one starts the "negotiation", and the following ones ride the gravy train. If I repeat the first code twice, All servers seem to have a similar result. $Timer1 = Timerinit() _AD_Open("", "", $sAD1) _AD_Close() Local $fDiff1 = TimerDiff($Timer1) $Timer1 = Timerinit() _AD_Open("", "", $sAD1) _AD_Close() Local $fDiff1 = TimerDiff($Timer1) $Timer2.... Am I right? Also, is there a better way to test the authentication time? Thanks for the help. - Dave