From 76fc3f820189ce8fdddf48a4ed897025823c1438 Mon Sep 17 00:00:00 2001
From: Bjarke Berg <mail@bergmania.dk>
Date: Thu, 17 Feb 2022 11:59:35 +0100
Subject: [PATCH] Fix for rooted UNC paths (#11982)

---
 .../DependencyInjection/UmbracoBuilder.FileSystems.cs          | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Umbraco.Infrastructure/DependencyInjection/UmbracoBuilder.FileSystems.cs b/src/Umbraco.Infrastructure/DependencyInjection/UmbracoBuilder.FileSystems.cs
index ccb515182e..fbb32671a1 100644
--- a/src/Umbraco.Infrastructure/DependencyInjection/UmbracoBuilder.FileSystems.cs
+++ b/src/Umbraco.Infrastructure/DependencyInjection/UmbracoBuilder.FileSystems.cs
@@ -1,3 +1,4 @@
+using System.IO;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
@@ -49,7 +50,7 @@ namespace Umbraco.Cms.Infrastructure.DependencyInjection
                 ILogger<PhysicalFileSystem> logger = factory.GetRequiredService<ILogger<PhysicalFileSystem>>();
                 GlobalSettings globalSettings = factory.GetRequiredService<IOptions<GlobalSettings>>().Value;
 
-                var rootPath = hostingEnvironment.MapPathWebRoot(globalSettings.UmbracoMediaPhysicalRootPath);
+                var rootPath = Path.IsPathRooted(globalSettings.UmbracoMediaPhysicalRootPath) ? globalSettings.UmbracoMediaPhysicalRootPath : hostingEnvironment.MapPathWebRoot(globalSettings.UmbracoMediaPhysicalRootPath);
                 var rootUrl = hostingEnvironment.ToAbsolute(globalSettings.UmbracoMediaPath);
                 return new PhysicalFileSystem(ioHelper, hostingEnvironment, logger, rootPath, rootUrl);
             });