I want to perform a search values in the DB NOT LIKE @Var

I have (5) values in my OU Table, where OU.OUID = 1, 2, 3, 4 or 5.
i.e.
1 = (OU=Desktops,OU=Prod,DC=Business,DC=Com)
2 = (OU=Laptops,OU=Prod,DC=Business,DC=Com)
3 = (OU=Desktops,OU=Dev,DC=Business,DC=Com)
4 = (OU=Laptops,OU=Dev,DC=Business,DC=Com)
5 = (OU=Prod,OU=Printers,DC=Business,DC=Com)
I want to exclude these OU's from the search. I've tried both the <> and NOT LIKE comparison operators and yet, it still returns the only 3 Workstations I have in my DB, which I would expect none of them to be returned.
Many thanks for supported provided,
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set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go
 
ALTER PROCEDURE [dbo].[GetWkstnsInNonSupportedOUs]
 
@Wkstn_OU smallint,
@Wkstn_OU2 smallint,
@Wkstn_OU3 smallint,
@Wkstn_OU4 smallint,
@Wkstn_OU5 smallint
	
AS
BEGIN
 
SELECT N.ComputerName, O.OUName
FROM Devices D INNER JOIN Network N ON D.DeviceID=N.DeviceID
INNER JOIN OU O ON N.OUID=O.OUID
WHERE O.OUID <> @Wkstn_OU Or O.OUID <> @Wkstn_OU2 Or O.OUID <> @Wkstn_OU3 Or O.OUID <> @Wkstn_OU4 Or O.OUID <> @Wkstn_OU5
 
END