From 9bf79aa9ddbe478e4aa10c45f344320b14525204 Mon Sep 17 00:00:00 2001
From: Gurkirat Khaira <62628582+khaira777@users.noreply.github.com>
Date: Fri, 29 Aug 2025 15:54:35 -0400
Subject: [PATCH] Add deprecation warning for Document Library tab creation via
 Graph API

Microsoft support has confirmed that the Document Library tab creation method using app ID `com.microsoft.teamspace.tab.files.sharepoint` is deprecated and no longer supported via Graph API. This commit adds a warning to the documentation to prevent developers from using this outdated method.
---
 concepts/teams-configuring-builtin-tabs.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/concepts/teams-configuring-builtin-tabs.md b/concepts/teams-configuring-builtin-tabs.md
index 87d5f3d46ee..699cb286fe5 100644
--- a/concepts/teams-configuring-builtin-tabs.md
+++ b/concepts/teams-configuring-builtin-tabs.md
@@ -72,6 +72,9 @@ POST https://graph.microsoft.com/v1.0/teams/{team-id}/channels/{channel-id}/tabs
 
 ## Document library tabs
 
+> [!WARNING]
+> Creating Document Library tabs using the `teamsAppId` `com.microsoft.teamspace.tab.files.sharepoint` is deprecated and no longer supported via Microsoft Graph API.
+
 For document library tabs, the `teamsAppId` is `com.microsoft.teamspace.tab.files.sharepoint`. 
 The following is the configuration.