Need to migrate forms to another URL?   But not sure how to update many data connections?  Try the script below.

This PowerShell will extract XSN contents to a folder, execute string search replace, and “package” back into CAB format with XSN extension.   A simple way to migrate InfoPath forms to another DNS name for scenarios like AAM Alternate Access Mapping redirection and SharePoint major version upgrade (2007 > 2010 > 2013).

Enjoy! 

NOTE – Requires CABARC.EXE  http://stackoverflow.com/questions/3361928/where-can-i-get-the-cabarc-utility

InfoPath_UpdateDataConnetions.ps1

# Update InfoPath form URLs by extracting CAB and performing search replace
Param(
	[string]$xsnFile
)
Write-Host "Prepare folders..."
md c:\InfoPath\before
md c:\InfoPath\temp
md c:\InfoPath\after
Write-Host "Clean temp..."
Remove-ChildItem c:\InfoPath\temp\*.* -Recurse
Write-Host "Extract XSN... $xsnFile"
cabarc x "c:\InfoPath\before\$xsnFile" *.* c:\InfoPath\temp\
Write-Host "Replace URL..."
$txt = Get-Content c:\InfoPath\temp\Manifest.xsf
$txt |% {$_ -replace "//sharepoint/" "//sharepnt07/"} | Out-File -FilePath "c:\InfoPath\temp\Manifest.xsf" -Encoding UTF8 -Force
Write-Host "package XSN..."
cabarc n "c:\InfoPath\after\$xsnFile" c:\InfoPath\temp\*.*
Write-Host "DONE"