Teams addin missing in Classic outlook in Azure virtual desktop

Hi Axel, 

Thank you for your response! It looks like I came to your response a little late. I already found the solution with this link, which has the script that you can directly deploy to install the addin.

New Microsoft Teams for Virtualized Desktop Infrastructure (VDI) - Microsoft Teams | Microsoft Learn

With the latest Teams versions, they got rid of those registries and made it simpler with one. The above link will give you more information.

But I'm very happy to get so many helps on this topic. Thank you, Axel and everyone. I truly appreciate all your help. <3

If (-not ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] 'Administrator') ){
    Write-Error "Need to run as administrator. Exiting.."
    exit 1
}

# Get Version of currently installed new Teams Package
if (-not ($NewTeamsPackageVersion = (Get-AppxPackage -Name MSTeams).Version)) {
    Write-Host "New Teams Package not found. Please install new Teams from https://aka.ms/GetTeams ."
    exit 1
}
Write-Host "Found new Teams Version: $NewTeamsPackageVersion"

# Get Teams Meeting Addin Version
$TMAPath = "{0}\WINDOWSAPPS\MSTEAMS_{1}_X64__8WEKYB3D8BBWE\MICROSOFTTEAMSMEETINGADDININSTALLER.MSI" -f $env:programfiles,$NewTeamsPackageVersion
if (-not ($TMAVersion = (Get-AppLockerFileInformation -Path $TMAPath | Select-Object -ExpandProperty Publisher).BinaryVersion))
{
    Write-Host "Teams Meeting Addin not found in $TMAPath."
    exit 1
}
Write-Host "Found Teams Meeting Addin Version: $TMAVersion"

# Install parameters
$TargetDir = "{0}\Microsoft\TeamsMeetingAddin\{1}\" -f ${env:ProgramFiles(x86)},$TMAVersion
$params = '/i "{0}" TARGETDIR="{1}" /qn ALLUSERS=1' -f $TMAPath, $TargetDir

# Start the install process
write-host "executing msiexec.exe $params"
Start-Process msiexec.exe -ArgumentList $params
write-host "Please confirm install result in Windows Eventlog"