Merge pull request #191387 from Clare-Zheng82/0311-Add_SFTP_TSG

Add TSG to SFTP troubleshooting doc

Author: PRMerger19

articles/data-factory/connector-troubleshoot-ftp-sftp-http.md

@@ -6,7 +6,7 @@ author: jianleishen
 ms.service: data-factory
 ms.subservice: data-movement
 ms.topic: troubleshooting
-ms.date: 10/01/2021
+ms.date: 03/11/2022
 ms.author: jianleishen
 ms.custom: has-adal-ref, synapse
 ---
@@ -172,6 +172,16 @@ This article provides suggestions to troubleshoot common problems with the FTP,
     1. On the ADF portal, hover on the SFTP linked service, and open its payload by selecting the code button.
     1. Add `"allowKeyboardInteractiveAuth": true` in the "typeProperties" section.
 
+### Unable to connect to SFTP due to key exchange algorithms provided by SFTP are not supported in ADF
+
+- **Symptoms**: You are unable to connect to SFTP via ADF and meet the following error message: `Failed to negotiate key exchange algorithm.`
+
+- **Cause**: The key exchange algorithms provided by the SFTP server are not supported in ADF. The key exchange algorithms supported by ADF are:
+    - diffie-hellman-group-exchange-sha256
+    - diffie-hellman-group-exchange-sha1
+    - diffie-hellman-group14-sha1
+    - diffie-hellman-group1-sha1
+
 ## HTTP
 
 ### Error code: HttpFileFailedToRead