View or Change the Properties of a Connection in a Project
Applies to: 
SQL Server
Azure SQL Database
Azure SQL Managed Instance
Azure Synapse Analytics
Analytics Platform System (PDW)
The properties of a connection saved in a project can be viewed and some can be modified.
To change the properties of a connection in a project
In Solution Explorer, right-click the connection, and then click Properties Window.
View the connection properties in the Properties window. You can change the Execution Timeout, Database, and Login Timeout properties.
See Also
Solution Explorer
Associate a Query with a Connection in a Project
Change the Connection Associated with a Query