Highlight cells of duplicate data from two spreadsheets

So, I have two spreadsheets that I tried to use conditional formatting to highlight duplicates, but failed.

Data from Spreadsheet A has multiple columns but I need to compare only: Column A - order # Column C - count Column D - date

Spreadsheet B also has many columns, but I need to compare: Column A - order # Column B - count Column E - date

I need to highlight column A in the rows on both spreadsheets when the data across the row is identical.
So if data in A,C D of whatever row is found to be identical in A,B,C of any row, then highlight A of that row on both sheets.

In this example, row 6 and 14 have different dates and 7 and 15 have different quantities so they wouldn't be flagged.
For ease of input I used only one spreadsheet, but this data is on two different spreadsheets.

Example.JPG

Dear G56:

1. can macros be used?
2. can there be multiple duplicates?
3. could you facilitate the sample spreadseet as an excel file?

Prefer not to use macros
There could be duplicates in order and count, but no on same date.
Cannot send file.

I have attached an example of the spreadsheet. There will definitely be multiple order numbers with the same count, but not on the same day, so a vlookup didn't work for me. What would the formula be? Maybe I could insert it in a conditional format.