$envelopedCms.Decrypt($certCollection) error

[mikaelfun]

how can it decrypt a null certcollection.
Stuck here. Please help.

[okieselbach]

Sorry totally missed your entry... This typically happens if you are not running this on a client joined to AAD/Intune. You have to run the script on the client where you downloaded the file. otherwise you will not have the certificate available. The MDM/Intune certificate is used for the decryption...

[elliot-huffman]

I have completely rebuilt the IntuneWin decrypter in PowerShell so that it doesn't need any external dependencies.
I have also added a few extra features to it and more documentation.

Take a peek and tell me what you think:
https://github.com/elliot-huffman/Powershell-Doodads/blob/main/Apps/Endpoint%20Manager%20(Intune)/Unprotect-IntuneWin.ps1