do you still have version 2016
this would be for 365 version - i'll look at 2016 version
=UNIQUE(FILTER(B2:B100000,A2:A100000=E1&""))
However the numbers in column A are actually Text
and E1 is a number
hence why i have added the &"" to the formula
OR
=IFERROR(INDEX($B$2:$B$100000, MATCH(0, IF($E$1&""=$A$2:$A$100000, COUNTIF($H$1:$H1, $B$2:$B$100000), ""), 0)),"")
as an array function control+shift+enter to get {} brackets around formula
Bookmarks