The server name and database name are retrieved from the connect string if you enable the Use DSN option. The connect string is the DSN configured in the odbc.ini file. If you do not enable the Use DSN option, you must specify the server name and database name in the connection properties. If you cannot to connect to the database, verify that you correctly entered all of the connectivity information.

After you upgrade, the Microsoft SQL Server connection is set to the OLEDB provider type by default. It is recommended that you upgrade all your Microsoft SQL Server connections to use the ODBC provider type. You can upgrade all your Microsoft SQL Server connections to the ODBC provider type by using the following commands:

If you are using the Informatica platform, run the following command:
infacmd.sh isp upgradeSQLSConnection

After you run the upgrade command, you must set the environment variable on each machine that hosts the Developer tool and on the machine that hosts Informatica services in the following format:

ODBCINST=<INFA_HOME>/ODBC7.1/odbcinst.ini 

After you set the environment variable, you must restart the node that hosts the Informatica services.

For specific connectivity instructions, see the database documentation.