One thing I've wished wasn't the case with the Integration Apps is all of the greyed-out options. In this case, I found a solution to my issue if I had access to the inbound/outbound filters, but I don't in the IA because it is greyed out. The other issue, in this case, is the customer is live and no longer has a Sandbox account to test with, so I have to do something in production. Because of this, I wanted to reach out here to see if there was already a solution.
In the "Criteria for Opportunity Sync" on the Salesforce-NetSuite IA (IO), I need to filter out any opportunity that came before 12/01/2021.
But that won't work as I don't have access to change the value to "expression" for the Integration App filter criteria. We just need to add a filter on opportunities: "Created Date" "is greater than" "2021-12-01T00:00:000Z".
As long as you have Manager or above permissions to the tile, you should be able to add your own filters to the Integration App. Lmk if you are not seeing this on your side.
We've added this to the customer instance and Integrator.io accepted the date. Waiting to hear back from the customer on whether or not this succeeded (we don't have access to Salesforce to test this change).