# Script created by Jeff Riechers
# Downloaded from www.jeffriechers.com
# Contact me with questions or recommendations at jeffriechers@gmail.com

#Teams 2.x Install
Start-Transcript -Path (Join-Path $env:TEMP "Updates.log") -Append -Force
$Teams2InstallPath = "C:\Program Files\WindowsApps\MSTeams_*"
If(!(test-path -PathType container $Teams2InstallPath)) {
Write-output "Teams 2.x not installed, downloading the latest bootstrapper.exe and installing now"
	$Teams2DownloadURI = "https://go.microsoft.com/fwlink/?linkid=2243204&clcid=0x409"
	$Teams2Path = Join-Path "$($env:TEMP)" "teamsbootstrapper.exe"
	Write-Output "Starting download of latest Teams 2.x client"
	(New-Object System.Net.WebClient).DownloadFile($Teams2DownloadURI, $Teams2Path)
	$Execute2Setup = " -p"
	$Team2Installproc = Start-Process -FilePath $Teams2Path -ArgumentList $Execute2Setup -PassThru
	$Team2Installproc.WaitForExit()
	Start-Sleep -Seconds 15
	Remove-Item -Path $Teams2Path -Recurse -Force
	$UpdatedTeams = (Get-ChildItem -Path "C:\Program Files\WindowsApps" -Filter "MSTeams_*" -Directory).Fullname | sort name | select -First 1
	$installableversion = Get-AppLockerFileInformation -Path $UpdatedTeams"\MICROSOFTTEAMSMEETINGADDININSTALLER.MSI" | Select -ExpandProperty Publisher | select BinaryVersion
   	$getversionnumber = $installableversion.BinaryVersion.toString()
	$TeamsAddinInstall = start-process -filepath "C:\Windows\System32\msiexec.exe" -argumentList '/i MicrosoftTeamsMeetingAddinInstaller.msi /qn ALLUSERS=1 /norestart TARGETDIR="C:\Program Files (x86)\Microsoft\TeamsMeetingAddin\',$getversionnumber,'"' -WorkingDirectory $UpdatedTeams -Passthru
	$TeamsAddinInstall.WaitForExit()
}
else {
Write-Output "Teams already installed, proceeding to check for updates."
}

$CurrentTeamsDirectoryCount = ((Get-ChildItem -Path "C:\Program Files\WindowsApps" -Filter "MSTeams_*" -Directory).Fullname).Count
$CurrentTeams = (Get-ChildItem -Path "C:\Program Files\WindowsApps" -Filter "MSTeams_*" -Directory).Fullname | sort name | select -First 1
$updateprocess = Start-Process -FilePath $CurrentTeams"\ms-teams.exe" -WindowStyle Minimized -PassThru
Start-Sleep -Seconds 60
$stopteams = Stop-Process -name "ms-teams"
$UpdatedTeamsDirectoryCount = ((Get-ChildItem -Path "C:\Program Files\WindowsApps" -Filter "MSTeams_*" -Directory).Fullname).Count
if ($UpdatedTeamsDirectoryCount -gt $CurrentTeamsDirectoryCount) {
	Write-Output "Updating Teams 2.x and Outlook Add-in"
	Start-Sleep -Seconds 60
	$updateprocess = Start-Process -FilePath $CurrentTeams"\ms-teams.exe" -WindowStyle Minimized -PassThru
	Start-Sleep -Seconds 60
	$stopteams = Stop-Process -name "ms-teams"
	$UpdatedTeams = (Get-ChildItem -Path "C:\Program Files\WindowsApps" -Filter "MSTeams_*" -Directory).Fullname | sort name | select -First 1
if ($UpdatedTeams -gt $CurrentTeams) {
	$updateprocess = Start-Process -FilePath $UpdatedTeams"\ms-teams.exe" -WindowStyle Minimized -PassThru
    Start-Sleep -Seconds 15
    $stopteams = Stop-Process -name "ms-teams"
    $installableversion = Get-AppLockerFileInformation -Path $UpdatedTeams"\MICROSOFTTEAMSMEETINGADDININSTALLER.MSI" | Select -ExpandProperty Publisher | select BinaryVersion
    $getversionnumber = $installableversion.BinaryVersion.toString()
    $TeamsAddInUninstall = Start-Process -FilePath "C:\Windows\System32\msiexec.exe" -ArgumentList "-x MICROSOFTTEAMSMEETINGADDININSTALLER.MSI /qn" -WorkingDirectory "C:\PROGRAM FILES\WINDOWSAPPS\MSTEAMS_*" -Passthru
	$TeamsAddInUninstall.WaitForExit()
	Remove-Item -Path "C:\Program Files (x86)\Microsoft\TeamsMeetingAddin\" -Recurse -Force
	$TeamsAddinInstall = start-process -filepath "C:\Windows\System32\msiexec.exe"-argumentList '/i MicrosoftTeamsMeetingAddinInstaller.msi /qn ALLUSERS=1 /norestart TARGETDIR="C:\Program Files (x86)\Microsoft\TeamsMeetingAddin\',$getversionnumber,'"' -WorkingDirectory $UpdatedTeams -Passthru
	$TeamsAddinInstall.WaitForExit()
	}
else {
	Write-Output "There are no new Teams 2.x updates available."
}
}
else {
Write-Output "There are no new Teams 2.x updates available."
}
Stop-Transcript