TFS 2017.3 on-premise environment: 1 App Server, 1 Web Server, 1 DB Server
I updated the sql server instance to include the port number (sqlserver\instance,portnumber) but now receive the following error during verification:
TF401293: The specified SQL Server instance sqlserver\sqlinstance,portnumber is invalid. A port number and a named instance cannot be specified simultaneously. Specify one or the other.
How do I resolve this?
Could you please try to disable Windows Firewall or configure it as shown here?
Since the SQL Server instance is a named instance, open SQL Server Configuration Manager and make sure SQL Server Browser service is enabled and is started.
Make sure SQL Server instance has protocol TCP/IP enabled.