YahyaOS - Here We Go
1. You can do this in Import (Data Source) provide a static value to UD3 as ByPass and in TR you can just set One to One ByPass -> ByPass
2. Option 2 - If the UD3 is not being used then you can disable it in the Integration in Cube Properties and remove it from Data Source and in TR.
3. Option 3 - BR or Complex Expression. BR(Conditional Rule) is Preferred, below is the example. You can expand based on your UD3 Member.
Dim UD3 As String = args.GetSource("UD3#")
Dim UD3Final As String = String.Empty
If TargetAcct.StartsWith("1") Then
UD3Final = "(BYPass)"
End If
return UD3Final