From 66d7b670f9e4677f613733eac71e26fcaf4e1f53 Mon Sep 17 00:00:00 2001
From: Technion <technion@lolware.net>
Date: Wed, 7 Apr 2021 22:28:17 +1000
Subject: [PATCH] Fix Exchange versions on UM mitigation

---
 Security/src/ExchangeMitigations.ps1 | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Security/src/ExchangeMitigations.ps1 b/Security/src/ExchangeMitigations.ps1
index ea7b3bf48f..a5d5c0ae7b 100644
--- a/Security/src/ExchangeMitigations.ps1
+++ b/Security/src/ExchangeMitigations.ps1
@@ -434,7 +434,8 @@ Function UnifiedMessagingMitigation {
 
     # UM doesn't apply to Exchange Server 2019
     $exchangeVersion = (Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\ExchangeServer\v15\Setup\')
-    if ($exchangeVersion.OwaVersion -notlike "15.0.*") {
+    if ($exchangeVersion.OwaVersion -notmatch "15\.[01]") {
+        Write-Verbose "[INFO] Skipping UM Mitigation for Exchange 2019"
         return
     }