2007 Excel Need help. Tech Support

2007 Excel Need help.

HI,

I have bulk email in my excel sheet I have to remove duplicate.

Column A is master list with 2000+ email id  (all email Id of column B are also there in A:A)
Column B is invalid/unwanted 500+ email id

I need a formula to remove All invalid/unwanted email of B in Column A.

Spotty.

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