# Define log file
$LogFile = "C:\temp\outlookremovalv2.txt"
# Ensure temp directory exists
if (!(Test-Path -Path "C:\temp")) {
    New-Item -ItemType Directory -Path "C:\temp"
}

# Function to log messages
function Log {
    param ([string]$Message)
    $Timestamp = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
    "$Timestamp : $Message" | Out-File -FilePath $LogFile -Append
}

# 1. Check for OutlookUpdate value and delete it
$KeyPath = "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsUpdate\Orchestrator\UScheduler_Oobe"
$ValueName = "OutlookUpdate"
Log "Checking for $ValueName in $KeyPath"
$Value = reg query $KeyPath /v $ValueName 2>&1
if ($Value -match $ValueName) {
    Log "$ValueName exists. Attempting to delete."
    reg delete $KeyPath /v $ValueName /f
    if ($?) {
        Log "$ValueName deleted successfully."
    } else {
        Log "Failed to delete $ValueName."
    }
} else {
    Log "$ValueName does not exist."
}

# 2. Enumerate ProfileList and modify specific keys
$ProfileListKey = "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList"
Log "Enumerating profiles in $ProfileListKey"
$Profiles = reg query $ProfileListKey
$Profiles -split "\r?\n" | ForEach-Object {
    if ($_ -match "S-1-5-21-\d+-\d+-817656539-(?!500$)\d+$") {
        $SID = $_ -replace "\s+$", ""
        Log "Found matching profile: $SID"

        $GeneralKey = "$SID\Software\Microsoft\Office\16.0\Outlook\Options\General"
        Log "Checking and setting HideNewOutlookToggle in $GeneralKey"
        if (reg query $GeneralKey /v HideNewOutlookToggle 2>&1 | Out-String | Select-String -NotMatch "The system was unable to find the specified registry key or value") {
            reg add $GeneralKey /v HideNewOutlookToggle /t REG_DWORD /d 00000000 /f
        } else {
            reg add $GeneralKey /v HideNewOutlookToggle /t REG_DWORD /d 00000000 /f
        }

        Log "Checking and setting DoNewOutlookAutoMigration in $GeneralKey"
        if (reg query $GeneralKey /v DoNewOutlookAutoMigration 2>&1 | Out-String | Select-String -NotMatch "The system was unable to find the specified registry key or value") {
            reg add $GeneralKey /v DoNewOutlookAutoMigration /t REG_DWORD /d 00000000 /f
        } else {
            reg add $GeneralKey /v DoNewOutlookAutoMigration /t REG_DWORD /d 00000000 /f
        }

        Log "Checking and setting NewOutlookAutoMigrationRetryIntervals in $GeneralKey"
        if (reg query $GeneralKey /v NewOutlookAutoMigrationRetryIntervals 2>&1 | Out-String | Select-String -NotMatch "The system was unable to find the specified registry key or value") {
            reg add $GeneralKey /v NewOutlookAutoMigrationRetryIntervals /t REG_DWORD /d 00000000 /f
        } else {
            reg add $GeneralKey /v NewOutlookAutoMigrationRetryIntervals /t REG_DWORD /d 00000000 /f
        }

        $PreferencesKey = "$SID\Software\Microsoft\Office\16.0\Outlook\preferences"
        Log "Checking and setting NewOutlookMigrationUserSetting in $PreferencesKey"
        if (reg query $PreferencesKey /v NewOutlookMigrationUserSetting 2>&1 | Out-String | Select-String -NotMatch "The system was unable to find the specified registry key or value") {
            reg add $PreferencesKey /v NewOutlookMigrationUserSetting /t REG_DWORD /d 00000000 /f
        } else {
            reg add $PreferencesKey /v NewOutlookMigrationUserSetting /t REG_DWORD /d 00000000 /f
        }
    }
}

# 3. Remove Outlook and related packages
Log "Removing Microsoft OutlookForWindows packages"
try {
    $OutlookPackage = Get-AppxPackage Microsoft.OutlookForWindows -ErrorAction Stop
    Remove-AppxProvisionedPackage -AllUsers -Online -PackageName $OutlookPackage.PackageFullName
    Remove-AppxPackage -AllUsers -Package $OutlookPackage.PackageFullName
    Log "OutlookForWindows package removed successfully."
} catch {
    Log "Error removing OutlookForWindows package: $_"
}

Log "Removing Windows Communications Apps"
try {
    Get-AppxProvisionedPackage -Online | Where-Object {$_.DisplayName -match "microsoft.windowscommunicationsapps"} | ForEach-Object {
        Remove-AppxProvisionedPackage -Online -PackageName $_.PackageName
    }
    Get-AppxPackage microsoft.windowscommunicationsapps | ForEach-Object {
        Remove-AppxPackage -AllUsers -Package $_.PackageFullName
    }
    Log "Windows Communications Apps removed successfully."
} catch {
    Log "Error removing Windows Communications Apps: $_"
}

# 4. Remove New Outlook from taskbar
$appname1 = "Outlook (New)"
Log "Attempting to unpin $appname1 from taskbar"
try {
    ((New-Object -Com Shell.Application).NameSpace('shell:::{4234d49b-0245-4df3-b780-3893943456e1}').Items() | ?{$_.Name -eq $appname1}).Verbs() | ?{$_.Name.replace('&','') -match 'Unpin from taskbar'} | %{$_.DoIt(); $exec = $true}
    if ($exec) {
        Log "$appname1 successfully unpinned from taskbar."
    } else {
        Log "$appname1 was not found on taskbar or could not be unpinned."
    }
} catch {
    Log "Error unpinning $appname1 from taskbar: $_"
}

Log "Script execution completed."