I created a custom SharePoint List form in InfoPath and needed to move it from UAT to Production.
File > Publish > Export Source Files. Close InfoPath
Go to folder where Source Files are saved, open Manifest.xsf. Find all instances of the URL and replace them with the new URL – there should be five. If you have secondary data connections, update those also.
I use Notepad++ and “replace all” so it just takes a second.
Save the manifest.xsf file and close. Now right click on the manifest.xsf and select Design to open it back up in InfoPath. Click on File >Publish and verify the URL is correct in the “Publish form to a SharePoint List” section”.