Invoices Reponse is a column you can Add(+) on Invoices Search when using Update.
Using Update you can change many invoices at once. Changing data like a Department will show you locked records that could not be changed so you can review each in turn.
Using Update for a status like Ready, to send automatically, tries to change any it can. Those that cannot be changed yet to Ready, will show their Response, like Not Ready.