From 78a4acf72cf71931be75dfa5cb61a6bf26c6c48c Mon Sep 17 00:00:00 2001
From: Bert Jansen <bjansen@microsoft.com>
Date: Thu, 3 Feb 2022 16:49:50 +0100
Subject: [PATCH] Hit client.svc on the root site collection to avoid being
 redirected there

---
 src/sdk/PnP.Core/Services/Core/PnPContext.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/sdk/PnP.Core/Services/Core/PnPContext.cs b/src/sdk/PnP.Core/Services/Core/PnPContext.cs
index 10c1636b00..6f0517cfca 100644
--- a/src/sdk/PnP.Core/Services/Core/PnPContext.cs
+++ b/src/sdk/PnP.Core/Services/Core/PnPContext.cs
@@ -808,7 +808,8 @@ internal async Task SetAADTenantId()
         {
             if (GlobalOptions.AADTenantId == Guid.Empty && Uri != null)
             {
-                using (var request = new HttpRequestMessage(HttpMethod.Get, $"{Uri}/_vti_bin/client.svc"))
+                // Hit client.svc on the root site collection to avoid being redirected there
+                using (var request = new HttpRequestMessage(HttpMethod.Get, $"{Uri.Scheme }://{Uri.DnsSafeHost}/_vti_bin/client.svc"))
                 {
                     request.Headers.Add("Authorization", "Bearer");
                     HttpResponseMessage response = await httpClient.SendAsync(request).ConfigureAwait(false);