In this blog post, you’ll learn more about the SQL Server Error Code 21626 and the error message description that is shown
SQL Server Error Code
21626
SQL Server Error Description for the Code :21626
Unable to connect to Oracle database server ‘%s’ using the Oracle OLEDB provider OraOLEDB.Oracle. For addition information, see SQL Server Error 21626 in Troubleshooting Oracle Publishers in SQL Server Books Online.