fix: Exchange monitor encoding for PS 5.1 (v1.6.3)

ASCII runtime strings in Exchange-MailSecurity and Notify-Common avoid parser errors when scripts are copied without UTF-8 BOM. Deploy copies .ps1 to ProgramData with UTF-8 BOM via Copy-ScriptFileWithUtf8Bom.

Deploy-DomainMonitors.ps1

@@ -1,4 +1,4 @@
-<#
+<#
 .SYNOPSIS
     Deploy domain monitor scripts (Exchange / AD) from share to ProgramData.
 .PARAMETER Target
@@ -47,6 +47,20 @@ function Write-TextFileUtf8Bom {
     [System.IO.File]::WriteAllText($Path, $Text, $Utf8Bom)
 }
 
+function Copy-ScriptFileWithUtf8Bom {
+    param(
+        [Parameter(Mandatory = $true)][string]$SourcePath,
+        [Parameter(Mandatory = $true)][string]$DestPath
+    )
+    $raw = [System.IO.File]::ReadAllBytes($SourcePath)
+    $utf8NoBom = New-Object System.Text.UTF8Encoding $false
+    $text = $utf8NoBom.GetString($raw)
+    if ($text.Length -gt 0 -and [int][char]$text[0] -eq 0xFEFF) {
+        $text = $text.Substring(1)
+    }
+    [System.IO.File]::WriteAllText($DestPath, $text, $Utf8Bom)
+}
+
 function Resolve-SourceShareRoot {
     if (-not [string]::IsNullOrWhiteSpace($SourceShareRoot)) {
         return [System.IO.Path]::GetFullPath($SourceShareRoot.TrimEnd('\'))
@@ -128,7 +142,11 @@ foreach ($name in $filesToCopy) {
         Write-DeployLog "WhatIf: copy $src -> $dst"
         continue
     }
-    Copy-Item -LiteralPath $src -Destination $dst -Force
+    if ($name -like '*.ps1') {
+        Copy-ScriptFileWithUtf8Bom -SourcePath $src -DestPath $dst
+    } else {
+        Copy-Item -LiteralPath $src -Destination $dst -Force
+    }
     Write-DeployLog "Copied: $name"
 }