we want to be able to connect to SQL server from ArcGIS pro using NTLM authentication. Right now, there is no option to select NTLM

[KannanSundaresan]

make NTLM as option that we can choose while making SQL server connection from ArcGIS pro. Right now only AD authentication is supported but ArcGIS server running in Linux cannot connect to SQL server without kerberos ticket renewal every 15 mins.

[MarceloMarques]

NOTES

Using NTLM authentication to connect to SQL Server - JDBC Driver for SQL Server | Microsoft Learn

Understanding Kerberos and NTLM authentication in SQL Server Connections - Microsoft Community Hub

kerberos - Why is MS SQL Server Using NTLM Authentication? - Server Fault

Using Kerberos Configuration Manager for SQL Server - SQL Server | Microsoft Learn

Using Kerberos integrated authentication to connect to SQL Server - JDBC Driver for SQL Server | Mic...

[KannanSundaresan]

Kerberos authentication on ArcGIS server in Linux is not supported by ESRI. So we thought of using NTLM  so that we have some security rather than no security. 

[MarceloMarques]

@KannanSundaresan - an alternative is to use SQL Server Connections with SSL Certificate for encryption and security, see link below to the SQL Server documentation. I hope this helps.

Configure SQL Server Database Engine for encryption - SQL Server | Microsoft Learn
Certificate requirements for SQL Server - SQL Server | Microsoft Learn
Configure client computer and application for encryption - SQL Server | Microsoft Learn