Install Quest On Demand Migration agent using Powershell
Here's a script that I'm using to roll out the Quest ODM agent on PCs in my environment that do not have access to the LAN. I used Atera Service Desk to deploy it for internet-only installation.
Agent install and hosting
This script requires that you download the Device Agent from the Quest Migration for Active Directory downloads page: 
Once that's complete, you will need to upload the file to a publicly accessible file share. I used Azure Files to create a storage container and provide direct access to the file. This URI will be pointed to in the script, so you cannot use something like OneDrive or SharePoint without special configuration.
Script
Before running this script, you will need to change the following XXX values:
$QuestODMMSIURI– This will be the publicly accessible MSI that you uploaded to your file share.- Auth Key – Found on the Quest Migration for Active Directory downloads page
Function Invoke-ODM_Agent_Install {
$InstallCheck = Get-ItemProperty -Path "HKLM:\SOFTWARE\WOW6432Node\Quest\On Demand Migration For Active Directory\ODMAD_AD" -ErrorAction SilentlyContinue
If ($null -eq $InstallCheck) {
Write-Host 'Downloading ODM agent.'
$QuestODMMSIURI = 'XXX' # Change to use your own Azure Files URI
$QuestODMdest = 'C:\Temp\ODM\QuestODM.msi'
Invoke-WebRequest -Uri $QuestODMMSIURI -OutFile (New-Item -Path $QuestODMdest -Force)
Write-Host 'Installing ODM agent.'
cmd /c "msiexec.exe /I `"C:\Temp\ODM\QuestODM.msi`" /qn SERVICEURL=https://us.odmad.quest-on-demand.com/api/ADM AUTHKEY=XXX" # Change to use your own authkey from Quest
Write-Host 'Finished installing ODM agent.'
}
ElseIf ($null -ne $InstallCheck) {
Write-Host 'ODM agent is already installed.'
}
Else {
Write-Host 'ERROR!'
}
}
Invoke-ODM_Agent_Install
