I have a worksheet that has thousands of serial numbers in column B
that have a date to be updated daily in column D, E, and F. Currently
I have to go through manually and find and match the serials from H to
B, then update the corresponding Column D,E, or F. How do I match
values from H with values from B and update dates in D or E or F from
I. Any help would be greatly appreciated I don't really know what I am
doing....

A B C D E F G H I
123 456 dateB
456 912 dateC
678
912
243

Thanks
Glenn