(SQL SERVER) a database connection object the "Test Connection" returns error U2012064

Document ID : KB000084397
Last Modified Date : 14/04/2018
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Error Message :
U2012064 - Connection Refused.

A new connection object is created. Upon clicking on 'Test Connection', an error message is returned.
Cause type:
Root Cause: The TCP/IP Protocol for MS SQL Server is not Enabled.
1. Start the SQL Server Configuration Manager.
2. Select SQL Server Network Configuration.
3. Right Click TCP/IP and choose Enable.
4. Open Services.msi.
5. Restart your applicable core SQL Server Service. 

Fix Status: No Fix