After installing Sage 300 2023 PU3
Prior to the upgrade to PU3 I had created the 2 databases and SQL user as described in the Sage 300 Enhanced Security document. When I logged into the Database Configuration Setup and entered the required fields on the Configure Databases screen, saving that screen gives the following error: "Cannot connect to the server. Make sure the server name, user ID, and password are entered correctly".
The entered information was double checked. All correct. The ODBC passes the connection test. For either Native Client 11 and 18.