Microsoft will end support for App-V in 2026 (plan for migration to MSIX)

Migration Plan: App-V to MSIX

Convert App-V to MSIX
- Use the MSIX Packaging Tool to convert existing App-V packages.
- Validate application functionality post-conversion.
Preserve User Settings
- App-V stores settings in %APPDATA%, %LOCALAPPDATA%, and HKCU\Software\Microsoft\AppV\Client\Packages.
- MSIX stores them in containerized locations (C:\Users\<User>\AppData\Local\Packages\).
- Migration Options:
  - Pre-Migration Script: Export & reimport registry settings, copy user data files.
  - Package Support Framework (PSF): Redirect file/registry access if needed.
Deploy & Test MSIX Packages
- Distribute MSIX using Intune, Configuration Manager (SCCM), or Group Policy.
- Test application behavior, including user settings persistence.
Decommission App-V
- Phase out App-V applications gradually while monitoring user experience.

As well you can use an PowerShell Screept for that

# Define App-V and MSIX package details
$AppVPackageName = “YourAppVPackageName”
$MSIXPackageID = “YourMSIXPackageID”

# Define paths
$AppVRegistryPath = “HKCU:\Software\Microsoft\AppV\Client\Packages”
$AppVUserDataPath = “$env:APPDATA\$AppVPackageName”
$MSIXUserDataPath = “$env:LOCALAPPDATA\Packages\$MSIXPackageID\LocalCache”

# Step 1: Export App-V registry settings
$RegistryExportPath = “$env:TEMP\AppV_Settings.reg”
reg export “$AppVRegistryPath\$AppVPackageName” $RegistryExportPath /y

# Step 2: Modify the registry export to match MSIX (if needed)
(Get-Content $RegistryExportPath) -replace $AppVPackageName, $MSIXPackageID | Set-Content $RegistryExportPath

# Step 3: Import the registry into the new MSIX structure
reg import $RegistryExportPath

# Step 4: Copy user data files from App-V to MSIX container
if (Test-Path $AppVUserDataPath) {
New-Item -ItemType Directory -Path $MSIXUserDataPath -Force
Copy-Item -Path “$AppVUserDataPath\*” -Destination $MSIXUserDataPath -Recurse -Force
Write-Output “User data copied successfully.”
} else {
Write-Output “No App-V user data found.”
}

# Cleanup temporary files
Remove-Item $RegistryExportPath -Force

Write-Output “Migration completed!”