Time created is time the document was originally created in the entry table..  Time updated is when the record was last written to.  In the case are AR_InvoiceHistoryHeader  that is when either the AR or SO sales journal was run and the invoice was updated from the invoice entry file to  AR_InvoiceHistoryHeader

from a user interface perspective what is happening? what i am seeing my folks do is type in SO, verify everything, then hit print. how would this translate to created vs updated? does 'print' = posting = updated?

from a user interface perspective what is happening? what i am seeing my folks do is type in SO, verify everything, then hit print. how would this translate to created vs updated? does 'print' = posting = updated?

Create an SO - does nothing related to invoice data.

Print an SO - does nothing related to invoice data.

Create an invoice (possibly from an SO) - sets the Date / Time "created" fields for the invoice.

Printing the invoice is irrelevant to the dates that appear in invoice history.

Posting the Sales Journal - moves the data from open invoice tables to AR invoice history and sets the Date Updated.

Note: some things have changed in recent versions, so to see exactly what happens in your system, go through all the steps in your process, using a test company, and see what the values mean in your version.