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BennaSu's avatar
BennaSu
Copper Contributor
Jul 24, 2025

Issue updating AVD app attach packages

Hi Community, I was trying to update the app attach package but the configuration gives me error message as these: Error expanding msix app attach package. The MSIX Application metadata expand requ...
Kidd_Ip's avatar
Kidd_Ip
MVP
Jul 26, 2025

Try to fix by the following:

 

1. Install KB5060829 or Later

Microsoft released KB5060829 on June 26, 2025, which addresses this exact issue:

  • Go to Windows Update on your session hosts.
  • Install KB5060829 or any newer cumulative update.
  • Reboot the session hosts and retry the App Attach operation.

2. Switch to VHDX Format

If updating isn’t feasible right now:

  • Repackage your MSIX into VHDX instead of CIMFS.
  • VHDX is more stable and not affected by the 24H2 bug.
  • Use tools like MSIX Hero or Microsoft’s MSIX Packaging Tool to convert.

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