Coordinator will not start due to an SSL communication issue between the coordinator and the SQL server (4288750)

Use a UDL (Data Link) file to test the connection to the SQL server:

1. Login to the CA server using the same account that you are specifying for the connection to the SQL server in the Coordinator Configuration
2. Create a new file named test.udl (ensure the extension is UDL)
3. Double click the file to invoke it
4. Enter the SQL server name (and instance if applicable, ServerName/InstanceName)
5. Select Used Windows NT Integrated security
6. Click the dropdown
7. Select the CA database (or another one if it has not yet been created)
8. Click Test Connection

An error similar to the following would indicate an authentication or encryption issue. Confirm TLS is not an issue:

[DBNETLIB][ConnectionOpen (SECDoClientHandshake())

OR

[DBNETLIB][ConnectionOpen (Connect()).]SQL. Server does not exist or access denied

OR

[DBNETLIB][ConnectionOpen (SECCreateCredentials()).]SSL Security Error