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Reducing list

  1. #1
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    Reducing list

    I am looking for a formula (maybe filter) which reduces a list as users select item. Thinking it may be a combination of filter and unique formula.

    List 1 is the master list of all the names.

    B3:B5 is the selection area. As users select names, the selection list should reduce. So since Frank and Billing have already been selected, only Ronald and Karen should be available in B5 drop down list.

    Thanks so much!
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  2. #2
    Forum Moderator Glenn Kennedy's Avatar
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    Re: Reducing list

    In 365, this is a little easier than in other versions.

    =COUNTIF(B:B,G3)

    in col H, and this in col I:

    =IFERROR(INDEX(G:G,AGGREGATE(15,6,ROW([List 1])/([List 2]=0),ROWS(I$3:I3))),"")

    Refer to col I as the DV range.
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    Glenn




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  3. #3
    Forum Expert WideBoyDixon's Avatar
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    Re: Reducing list

    You'll need to create another list to use as the data validation list. Put this formula in I3:

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    Then highlight B3:B5 and change the data validation to be a list contained in:

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    Note the # at the end - it's important.

    That should then reduce the available list when you select users into other slots.

    WBD
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  4. #4
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    Re: Reducing list

    Both solutions worked perfectly....thanks WideBoy and Glenn!

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