I have two excel sheets with common column called UPN. One sheet has 650 rows and the other has 600. Sheet2 (600) only has two columns Column A - UPN and Column B - Last Logon Date. Sheet 1 has 10 columns with various headings. I want to insert column B from Sheet 2 into Sheet 1 corresponding to matching UPN. I know VLOOKUP is my friend here, but still confused as to how to do this. Any simple explanations to assist me ?