I don't quite understand your references to Column A and Column B. They don't align with your sample data, but here is a solution as I understand it using your sample data. Hopefully it is sufficient for you to make the adjustments to match your actual data. If not, then reply with excerpts that match more precisely the actual layout of your data and sheets.
Here is the procedure to highlight with Conditional Formatting the data in Column B of your mock-up that matches with the search accounts that are listed in Column E.
- Select all of the cells that need to be considered for the Conditional Formatting. In the screenshot that will be B3:B7. Make sure that the B3 reference in the formula matches the first row that you begin your selection in.
- On the Home ribbon open Conditional Formatting>New Rule>Use a Formula. In the Format Values line enter this formula adjusted for the actual location of your data. The E3:E4 reference is for the account #'s you want to identify and the B3 reference is the first account # in the selection.
=COUNTIF($E$3:$E$4,$B3)>0
- Click on the Format button at the lower right and choose the formatting that you want in the Format Cells dialogue. Then click OK and OK.
Any Account # in Column B in the sample that occurs in the list in Column E will be highlighted by the Conditional Formatting.