Hello guys, I'm in trouble again

I have 2 workbooks , in Workbook A I have all the orders from our clients with the date when they exit the production.
In Workbook B, the orders are splited in sheets with delivery date.
Workbook A was exported from our system, Workbook B was made "manually".
What I need is to find where the values are not the same(end of production date - delivery date).
For this I need a code that finds a certain value from Workbook A in Workbook B and returns sheet name. Is this possible?


Thank you in advance !